After an endearing World War II veteran and family man is laid to rest from apparent natural causes, a surprise witness surfaces with murder accusations, sparking a police investigation into a devious predator.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

An investigation into the mysterious death of a loving mother leads authorities to uncover a diabolical plot hatched close to home.

A troubled Las Vegas lawyer goes to sleep early while her psychologist husband takes their daughters out to dinner; when she doesn't wake up the next morning, her family is convinced there's more to this incident than investigators initially believe.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

Intruders break into a family's home.

A troubled Las Vegas lawyer goes to sleep early while her psychologist husband takes their daughters out to dinner; when she doesn't wake up the next morning, her family is convinced there's more to this incident than investigators initially believe.

Intruders break into a family's home.

Intruders break into a family's home.

An aspiring doctor shoots her husband in front of their two sons on the side of a Nebraska interstate; a jury must decide whether this was an abused woman defending her life or a fed-up wife who wanted out of her marriage.

Hollywood actress Aasha Davis' sister, Lesley, goes missing after a fight with her husband never to be heard from again.

An aspiring doctor shoots her husband in front of their two sons on the side of a Nebraska interstate; a jury must decide whether this was an abused woman defending her life or a fed-up wife who wanted out of her marriage.

After a naval reservist is gunned down in her car outside an Atlanta mall, detectives pour over video footage, phone records and forensic evidence, only to discover that the DNA sample found at the crime scene creates an unforeseen twist in the case.

A family is in shock when their patriarch kills his brother-in-law and claims self-defense; when police uncover a bizarre story of missing cash and betrayal among this tight-knit immigrant family, the community doesn't know what or who to believe.

After a naval reservist is gunned down in her car outside an Atlanta mall, detectives pour over video footage, phone records and forensic evidence, only to discover that the DNA sample found at the crime scene creates an unforeseen twist in the case.

A young mother in the quiet Atlanta hamlet of Buford is found shot to death in what detectives deem to be a staged suicide; as investigators search for leads, they uncover an eerily similar death linked to someone with close ties to both victims.

The police discover a body wrapped in duct tape on church grounds in the posh neighborhood of Buckhead, Atlanta; detectives must untangle a web of romance, jealousy and deceit to uncover who killed a beloved father of two.

The family of a former soldier questions whether or not his death was a tragic coincidence when they learn of a suspicious detail from his wife's past.

When an Atlanta-area horse trainer abruptly vanishes from his ranch, police search for the missing father-to-be, ultimately discovering a salacious secret where untamed passions may have led to the victim's untimely demise.

The family of a former soldier questions whether or not his death was a tragic coincidence when they learn of a suspicious detail from his wife's past.

When a missing man's body is found, his wife finds herself under a microscope; police want to solve the case before it goes cold.

When men who helped a.

Devoted to raising her daughter's child, a loving grandmother is found executed in her own home; police unfold an ongoing custody battle which leads to suspicions towards those nearest to her grandchild.

A young man ends up dead while out hunting; investigating whether this is a case of an accidental shooting, or if there is a more sinister explanation.

An Arizona socialite makes a gruesome discovery, which leads local law enforcement to ask questions about her troubled marriage; she claims she found a man dead, but police have reason to believe otherwise.

A young man is brutally murdered, and a woman is found covered in blood just hours later; she is adamant that she is innocent, and later a twist in the case shocks everyone involved.

While investigating the tragic murder of a devoted father in Virginia, detectives must work their way through several disturbing theories and contentious family dynamics to get to the heartbreaking truth.

Death hits close to home when a Mississippi father of four is brutally killed on his own front porch; soon, a mother and son turn against one another as detectives work to untangle a murky tale of he said she said to close in on a killer.

The identity of a Jane Doe found dead in a New Jersey park holds the key to unraveling a tangled web of fraud and murder that spanned years and pulled in multiple victims along the way.

When the body of a beloved father is discovered in a South Carolina home, detectives uncover a toxic love affair that had deadly consequences.

Letti Strait was found guilty of her ex-husband's murder 12 years after the crime.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

An attorney is murdered, and a trail of obsession and jealousy emerges.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

After shedding hundreds of pounds, a popular kindergarten teacher goes missing; investigators find a link between her weight loss and her disappearance.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

After shedding hundreds of pounds, a popular kindergarten teacher goes missing; investigators find a link between her weight loss and her disappearance.

A foreign exchange student and soccer player's participation in a dangerous game leads to deadly consequences.

A former Marine is fatally shot by his neighbor in broad daylight; the shooter claims self-defense, but eyewitnesses state he was the aggressor; when investigators uncover a feud between the two, it calls both of their motivations into question.

When detectives track down the killer of a Las Vegas cocktail waitress and mother, it becomes clear that the investigation has just begun.

A former Marine is fatally shot by his neighbor in broad daylight; the shooter claims self-defense, but eyewitnesses state he was the aggressor; when investigators uncover a feud between the two, it calls both of their motivations into question.

Tragedy strikes rural Iowa as two women are found murdered in their homes; when a local bank is robbed the same day, investigators connect the crimes to an unfolding crime spree and race to find the killer siblings before they can strike again.

Hector Campos fatally shoots neighbor Ana Weed after an argument on their property line; while Hector takes to national TV to plead self-defense, Ana's family reveals to investigators a tale of betrayal, secret spouses and a fateful escape to Mexico.

Tragedy strikes rural Iowa as two women are found murdered in their homes; when a local bank is robbed the same day, investigators connect the crimes to an unfolding crime spree and race to find the killer siblings before they can strike again.

Teen brothers rebel against their strict upbringing and become skinheads, and when their mother, father and younger brother are discovered murdered in their home, police begin a manhunt that leads them across three states.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

A home invasion starts a massive manhunt through the remote, snowy wilderness of Idaho for two bank-robbing brothers who once helped catch a notorious Soviet spy.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

When a pregnant army wife and mother are found shot to death in her home, it is ruled a suicide, but dogged police work unlocks a devious plot and secrets buried in ashes thousands of miles away.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

When a pregnant army wife and mother are found shot to death in her home, it is ruled a suicide, but dogged police work unlocks a devious plot and secrets buried in ashes thousands of miles away.

When a beloved college student dies under suspicious circumstances, controversy rages for years between investigators, medical examiners and her family, until a final shocking conclusion is reached.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

A couple's pickup is found submerged in a lake, and the wife's death appears to be the result of a horrible accident until investigators learn that not everything is as it seems in this pair's union.

When the half-dressed, partially frozen body of a Navy veteran is found lying in a ditch, rumors and lies will challenge detectives' efforts to lay bare the truth behind the chilling death.

A shocking carjacking may have ties to international espionage, or the murderer could turn out to be someone much closer to home.

A chance for love brings an Oklahoma woman to rural Texas, but her quick disappearance has investigators following a paper trail that will expose the treachery of greed.

The twisted story of a heinous murder plot in Kansas; rife with betrayal and deceit; in an exclusive interview with someone personally involved in the crime, hear a riveting account of the deadly scheme.

After a John Doe's body is found at a Virginia park, investigators track a killer who has a long history of wrongdoing.

The mysterious disappearance of a beloved nurse leads Arkansas investigators down a twisted path of familial betrayal; as detectives hunt for the missing woman, evidence upturned along the way points toward deadly foul play.

The body of an unidentified female is found within a forested nature center in Bloomington, Ill; investigators must scramble to piece together her fractured life and try to determine just how familiar her killer may be.

Former police officer Laurie Bembenek is found guilty of murdering her new husband's ex-wife; years later, new evidence comes to light that changes everything.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

When Idaho family members return home from a church gathering, they find dinner burned to a crisp, a missing fiancée and signs that a brutal crime has been committed; all leads point close to home as detectives begin their investigation.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

As a murder victim's sisters dedicate themselves to finding the killer, an unexpected source turns the case upside down.

Seventeen-year-old Anthony Templet calls 911, confessing to shooting his father in self-defense; with no signs of a physical attack, authorities suspect murder; as the investigation unfolds, the dark underbelly of the family is exposed.

A model with a checkered past goes under cover to reveal the truth about a cold case involving a romantic getaway on a boat that ended with a woman being lost at sea.

Seventeen-year-old Anthony Templet calls 911, confessing to shooting his father in self-defense; with no signs of a physical attack, authorities suspect murder; as the investigation unfolds, the dark underbelly of the family is exposed.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

A mother of three shoots and kills her neighbor in a home invasion, leaving a small community grasping for answers; while the neighbor's parents question this apparent act of self-defense, police find a journal that leads to the truth.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

The sudden disappearance of Manjit Panghali sparks a massive search for the pregnant mother; investigators uncover a tight-knit immigrant community in shock, a family in mourning and a killer relationship exposed.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

The sudden disappearance of Manjit Panghali sparks a massive search for the pregnant mother; investigators uncover a tight-knit immigrant community in shock, a family in mourning and a killer relationship exposed.

Newly single Michele Davis is killed when her car careens off an Iowa highway; what looks like an accident is anything but, however, as investigators peel back the layers of her life and discover a motive for murder.

Firefighter Ben Amato is callously murdered, but the case goes cold; a jailhouse snitch, critical clue and seemingly unrelated homicide expose a sinister plot as investigators stay on the trail of a heartless killer.

A woman is shot to death while driving her sons home from a Thanksgiving celebration; the hunt for her killer leads to an unlikely suspect, making investigators realize her murder is not as random as it seems.

Young mother Elizabeth Ferrell goes missing in Texas as a body is found in Louisiana; as detectives connect the dots between the two cases, secrets rise to the surface and reveal a shocking tale of love, betrayal and revenge.

A woman is shot to death while driving her sons home from a Thanksgiving celebration; the hunt for her killer leads to an unlikely suspect, making investigators realize her murder is not as random as it seems.

When Dr. Joe Sonnier is murdered, the investigation reveals simmering jealousies and a love triangle; Andrea Canning recalls a doctor who dedicated his life to helping others.

When a young woman home from college ends up murdered in her home and the tools of her demise turn out to be the rolling pin and carving knife the family planned to use for Thanksgiving dinner, investigators struggle to solve this holiday horror.

When Dr. Joe Sonnier is murdered, the investigation reveals simmering jealousies and a love triangle; Andrea Canning recalls a doctor who dedicated his life to helping others.

After Lisa Zeigert is killed, her family keeps the case in the public eye for decades; Andrea Canning reflects on the harrowing mystery and discusses the inspiration she's drawn from Lisa's loved ones.

After Lisa Zeigert is killed, her family keeps the case in the public eye for decades; Andrea Canning reflects on the harrowing mystery and discusses the inspiration she's drawn from Lisa's loved ones.

After trumpet player Scott Sessions fails to show up for a scheduled gig, his family learns his body was abandoned in the remote Colorado Rockies; as the investigation narrows in on two suspects, a second murder catches police by surprise.

Andrea Canning reflects on a story that reminded her how people can be vulernable and how quickly life can change; she speaks with Judge Esther Salas about the knock at her door that robbed her of the most important thing in her life.

Exploring the stories through firsthand accounts told by people who are close to the crime, including investigators who dedicated their time to the cases and family members who are still trying to confront the tragedies that befell their loved ones.

Andrea Canning reflects on a story that reminded her how people can be vulernable and how quickly life can change; she speaks with Judge Esther Salas about the knock at her door that robbed her of the most important thing in her life.

A chance encounter on the Pacific Coast Highway with a woman he first spoke to in a jail cell leads Keith Morrison to re-examine the mysterious death of Las Vegas casino magnate Ted Binion.

A pastor's secrets come to light, triggering a murder investigation; Josh Mankiewicz looks back at a case that shattered a congregation and exposed the cost of their trust.

When a homemaker dies in her hot tub, detectives in a normally quiet Idaho town first believe it to be a horrible accident. But the investigation leads back to the unsolved murder of her husband, reminding police that lightning never strikes twice.

A pastor's secrets come to light, triggering a murder investigation; Josh Mankiewicz looks back at a case that shattered a congregation and exposed the cost of their trust.

When a homemaker dies in her hot tub, detectives in a normally quiet Idaho town first believe it to be a horrible accident. But the investigation leads back to the unsolved murder of her husband, reminding police that lightning never strikes twice.

The sister of a man who died after robbing a bank when a bomb that was placed around his neck detonated talks about the case.

A former Gang Unit investigator is found dead in his crashed van on the freeway, and all signs point to a DUI. But when four bullets are found in his body, a decade-long homicide investigation must consider gang retribution or lover's revenge.

The sister of a man who died after robbing a bank when a bomb that was placed around his neck detonated talks about the case.

The sister of a man who died after robbing a bank when a bomb that was placed around his neck detonated talks about the case.

An Army veteran kills the head of his girlfriend's household after confronting him about sexually assaulting the young woman; after hearing a recording of the fight, investigators must decide if this was vigilante justice or self-defense.

As detectives struggle to find leads in the murder of a college student, the perpetrator strikes again.

After suffering years of abuse, a Missouri woman claims she had no choice but to kill her husband during a gun struggle; when the autopsy is performed on the body her mother helped her bury, however, her self-defense story comes into question.

After suffering years of abuse, a Missouri woman claims she had no choice but to kill her husband during a gun struggle; when the autopsy is performed on the body her mother helped her bury, however, her self-defense story comes into question.

An Ozarks country wedding brings hope and second chances to a Christian couple; but friends and family are mystified when they vanish in the dead of night from a farmhouse that had been given to them by the groom's mother.

Happy newlyweds renovate a house for their future family when tragedy strikes; it isn't until a dark and twisted secret is revealed that justice is served for a devastating double homicide.

Just five days before her elaborate Long Island wedding, a beautiful and brilliant Yale student goes missing; a massive search effort is launched to find her before her wedding day.

Just five days before her elaborate Long Island wedding, a beautiful and brilliant Yale student goes missing; a massive search effort is launched to find her before her wedding day.

A 14-year-old girl discovers her wealthy father brutally executed in their home late at night; the investigation proves that not everything is as it seems, uncovering love affairs, possible connections to the mob and a twisted journey to justice.

As investigators dig deeper into a man's disappearance, they realize his recent online presence may be a charade.

When the last real cowboy is found dead at home, detectives dig in and are hard-pressed to find anyone who'd want to see this loving father murdered; a closer look at his nearest confidants unravels a heinous plot twisted by love and money.

After a beloved town librarian is gunned down, investigators discover that this murder-for-hire gives a whole new meaning to a broken heart.

When a Texarkana square dancer is gunned down on the steps of her home, detectives follow a trail of surveillance footage leading straight to the killer.

When a Texarkana square dancer is gunned down on the steps of her home, detectives follow a trail of surveillance footage leading straight to the killer.

Andrea Canning recalls a case in which investigators set up an elaborate sting operation to stop a murder-for-hire plot.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies; Dennis Murphy looks back on his interview with the lead suspect.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies; Dennis Murphy looks back on his interview with the lead suspect.

A beloved couple is found murdered among a lifetime of valuable collectibles in their home; investigators want to know if there is a connection between the memorabilia and the murders.

A beloved couple is found murdered among a lifetime of valuable collectibles in their home; investigators want to know if there is a connection between the memorabilia and the murders.

The murder of a businessman exposes a tangled web extending from the Pacific Northwest to the North Dakota oil patch; investigators race to piece together seemingly disconnected clues to catch a monster before he strucks again.

The murder of a businessman exposes a tangled web extending from the Pacific Northwest to the North Dakota oil patch; investigators race to piece together seemingly disconnected clues to catch a monster before he strucks again.

It is a case Josh Mankiewicz cannot forget because, while a student-athlete did everything right to keep herself safe, others did not; after she was found murdered, investigators learned she reached out for help multiple times before her death.

Chris Smith's family receives an email stating that he is leaving California to surf the world; months later, they wonder if he really left; Keith Morrison offers new insights into the case.

Chris Smith's family receives an email stating that he is leaving California to surf the world; months later, they wonder if he really left; Keith Morrison offers new insights into the case.

Jacquelyn Smith is stabbed to death in Baltimore, in what appears to be a random act of violence; as detectives dig deeper, they uncover a diabolical plan, vicious lies and a killer relationship.

Ed Bozarth lives life on the sea, but paradise turns deadly when the dashing adventurer is found dead on his boat in Key Largo; just below the surface, investigators discover a secret past, a life full of intrigue and enemies within.

Ed Bozarth lives life on the sea, but paradise turns deadly when the dashing adventurer is found dead on his boat in Key Largo; just below the surface, investigators discover a secret past, a life full of intrigue and enemies within.

A Connecticut bank executive is targeted by criminals who force him to rob his own bank.

A Connecticut bank executive is targeted by criminals who force him to rob his own bank.

Robert Davis, who was convicted of murdering a woman and her son, claims his confession was coerced and tries to prove he is innocent.

Robert Davis, who was convicted of murdering a woman and her son, claims his confession was coerced and tries to prove he is innocent.

A cosplay model makes a frantic 911 call and claims that she woke up to find her boyfriend stabbed to death; surveillance footage from around the home leads detectives to the killer,it raises the question of whether it was self-defense or murder.

Wealthy dentist Kirk Turner tells police he killed his wife, Jennifer, with a pocket knife after she impaled him with a spear.

Spree killer Joanne Dennehy's daughter Shianne shares how she has struggled to come to terms with the realities of being the child of Britain's most dangerous woman.

Peter Tobin raped and murdered Angelika Kluk in 2006, and with the help of his ex-wife, Cathy Wilson, a groundbreaking investigation unearthed more victims and revealed him to be a serial killer.

The ex-girlfriend of the self-proclaimed Crossbow Cannibal reveals the mental and physical abuse she endured for years at the hands of one of the U.K.'s most heinous serial killers.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

Allegations of real estate fraud and rumors of murder have Sarasota Police on the trail of a criminal whose final plan to evade trouble lands her in the very hands she tried to avoid.

When a Kapowsin, Wash., mother is discovered murdered on her couch in a compromised position, investigators must piece together all the evidence to determine if this was a random crime of opportunity or a facade to humiliate the victim.

Police race for answers after a school teacher is found murdered in her San Antonio, Texas, apartment; while lies and betrayals come to light, the case goes cold, but one detective refuses to give up.

When two sisters' husbands turn up dead within weeks of each other, Florida detectives investigate whether the cases are linked.

After a well-known business owner is found dead in his Lake Orion apartment, investigators are left untangling a web of lies to uncover a deadly duo looking to get rich quick.

When a devoted father is found brutally stabbed to death in his Florida home, detectives turn their focus to the picture-perfect family who appear to have it all.

After a young woman vanishes from her neighborhood, North Carolina detectives are snared in a tangled web of deceit as they uncover a vicious love triangle; it's a race against time to find a killer and the evidence they need to solve a dark mystery.

When a young mother in Newport, Maine, goes missing, the case goes cold until another mom suddenly vanishes, sparking an investigation that leads to a deadly game of cat and mouse and grisly discoveries in a rustic backyard.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

After a Georgia father is discovered bludgeoned by a hammer in his own bedroom, it takes years for detectives to nail down if this murder is connected to a series of online romances or a case of mistaken identity.

When a man goes missing in rural Barnesville, Ga., investigators try to determine if he left on his own or if foul play occurred.

When two Ghanian immigrants are discovered murdered in their upscale Maryland home, police are confronted with bizarre evidence that motivates them to take a closer look at the mystifying rituals of voodoo.

A Jacksonville, Fla., firefighter discovers a disturbingly violent scene in his darkened bedroom on a Halloween weekend.

A Jacksonville, Fla., firefighter discovers a disturbingly violent scene in his darkened bedroom on a Halloween weekend.

An investigation into the murder of a beloved couple in South Carolina reveals a feud and divides a family.

When a Chicago woman from a big family goes missing, investigators begin to suspect a man in her life is full of secrets.

After a woman reports a prowler, police find her Olympic bronze medalist husband dead in their backyard.

Investigators in Gresham, Ore., are left with a gruesome crime scene, an assailant on the loose and a missing child after the victim of a stabbing is able to call 911 in a last attempt to save her own life.

After the burned body of a local man is found in rural Missouri, the homicide goes unsolved for nearly two decades until a twisted murder plot is brought to light.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

When 24-year-old Terry Rouse disappears near a southern Georgia swamp, his devastated mother relentlessly pursues a one-woman investigation that runs parallel to law enforcement; what she and the detectives ultimately uncover shocks everyone.

The last precious moments of rising star Maple Batalia are captured on a security camera before she's gunned down at her college campus in British Columbia; a community grieves as a mother's anguished pleas for justice capture national attention.

Dino and Clara Pantazes run a successful bail bond business and their 20-year marriage is seemingly perfect; when Clara is gunned down at home, however, detectives wonder if an angry client is to blame or if there is more to their fairy-tale story.

Popular high school senior Chris Daigle mysteriously disappears from Missouri City, Texas; for nearly a decade, his mother will stop at nothing to get answers while keeping friends close but enemies closer.

When Melissa Henderson is found dead in her bed, a perplexing mystery ensues; her husband and family believe her death is from natural causes, but the clues lead investigators to a secret life of spying and jealousy and ultimately to a killer.

Jack Rains, an 83-year-old veteran and retired State Trooper, is gunned down at his kitchen table, shot five times in the back of the head; his family and the community are stunned as detectives uncover a tangled web of secrets, misdeeds and deceit.

Popular teacher and single mom, Bianca Tanner, is embarking on a new chapter in her life with multiple admirers, when she suddenly vanishes; to uncover her fate, detectives investigate each suitor to determine who is genuine and who is a killer.

Popular TV anchor, Diane King, is a local celebrity, passionate advocate and a loving wife and mother; when she gets murdered in her driveway, however, the investigation reveals a twisted tale of sex, lies and stalking.

Family man and all-around nice guy, Trent Mallory is murdered in his sleep in rural upper Michigan; sorting through multiple suspects and motives, the police set a trap to catch his cold-hearted killer.

A respected and beloved chiropractor is found bludgeoned to death in his home outside Philadelphia; investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

When a young father goes missing, authorities suspect his illegal activities, but a revelation about the mother of his children turns the investigation upside down.

When a hospital employee dies mysteriously on a Center City sidewalk, detectives uncover surveillance footage of the murder that leads straight to the doorstep of a suspected serial killer who may be tied to a string of unsolved crimes.

A respected and beloved chiropractor is found bludgeoned to death in his home outside Philadelphia; investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

Family man and all-around nice guy, Trent Mallory is murdered in his sleep in rural upper Michigan; sorting through multiple suspects and motives, the police set a trap to catch his cold-hearted killer.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

A man who was recently acquitted of the murder of his ex-girlfriend's 12-year-old son tells his story; interview with the victim's mother and key players in the case.

When remains are found amid the rubble after a house fire, authorities soon discover the incident was no accident.

After a sudden marriage creates tension between two families, a murder exposes secrets, lies and a long-buried mystery.

Before time runs out, detectives race to find a Little Rock, Ark., realtor who went missing after showing a house.

Soon after Cathy and Jeff Lamb rekindle their marriage, Cathy is found savagely beaten to death in their home; with the couple's three dogs as their only witnesses, detectives untangle a number of complex relationships to find her killer.

Family man and all-around nice guy, Trent Mallory is murdered in his sleep in rural upper Michigan; sorting through multiple suspects and motives, the police set a trap to catch his cold-hearted killer.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

Wilton Manors, Fla., investigators search for motives after a beloved father is found strangled and battered in his driveway, until an unsuspected confession reveals a complex web of deceit.

Authorities are left stunned when stories of mysticism and conspiracy come to the front while they investigate the disturbing murders of an elderly Vietnamese couple in Texas.

Robbery seems to be a plausible motive when a North Carolina man is found shot to death in a roadside ditch, but the case remains cold for years until a mysterious letter reveals a more sinister motive than anyone could have imagined.

After the deceased body of a St. Petersburg, Fla., woman is found in an abandoned trailer, investigators search for answers and uncover the dark truth of what happens when someone is pushed too far.

After leads dry up in a missing person case, detectives in Ennis,Texas, discover a severed body part at a nearby lake; after confirming the DNA match, they begin to uncover the rippling relationship that led to the death of a beloved father.

Authorities are puzzled when a beloved Georgia grandmother is shot execution style, but as the investigation unfolds, a once close-knit family turns against itself.

A young woman seeks refuge at the home of a Wisconsin farmer, claiming she just escaped from a violent assault; when investigators arrive at the crime scene, they make a discovery that leads them to expose a deadly love triangle.

A well-respected firefighter and loving family man is found gunned down outside his Philadelphia home, sending police on a furious search for his killers; what they find stuns even the most hardened investigators among them.

A respected and beloved chiropractor is found bludgeoned to death in his home outside Philadelphia; investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

A well-respected firefighter and loving family man is found gunned down outside his Philadelphia home, sending police on a furious search for his killers; what they find stuns even the most hardened investigators among them.

The body of a teen is found at a local party spot and theories surrounding her death spread, but the case goes cold for 30 years, until the investigation heats back up.

When a beloved woman in North Carolina is found stabbed to death in her own home, investigators uncover an unnerving history of harassment carried out by a killer blinded by jealousy.

A Thanksgiving feast turns into a family's last when a cold blooded killer brutally stabs and dismembers a couple the day after their holiday celebration.

A prominent couple are found brutally murdered in their Montgomery, Ala., home on Thanksgiving night, leading detectives on a cat-and-mouse chase spanning thousands of miles across multiple states.

Investigation into a deadly house fire.

Investigation into a deadly house fire.

A community is left in shock when a Cornell student and star athlete gets caught in the middle of a homicide investigation.

When a hockey player and a single mom are found dead in an upscale Newport Beach, Calif., condo, loved ones have no idea how they knew each other; the discovery of a link to another area attack launches the race to catch a killer.

When two loyal employees at a family-owned mobile home business are gunned down at work, detectives are left with no hints toward a motive; a hunt for a missing car reveals a killer driven by old-school Orange County, Calif., intentions.

After a beloved party planner at an iconic Laguna Beach, Calif., hotel is found murdered at home, investigators use high-tech tools and old-fashioned shoe leather to capture two killers and restore calm to the tight-knit beachside community.

A popular therapist suffers a deadly attack in her Hollywood Hills home and police must trace a trail of deadly obsession and rage to find her killer.

The murder of a popular hairdresser in Cincinnati leaves police stunned and desperate for answers; an unexpected break comes when a routine traffic stop in a neighboring county uncovers a vicious and deadly plot no one saw coming.

A well-respected firefighter and loving family man is found gunned down outside his Philadelphia home, sending police on a furious search for his killers; what they find stuns even the most hardened investigators among them.

When the wife of an Army medic is murdered in her Hawaii home, the investigation reveals a sordid tale of secrets, lies and a twisted romance that captured headlines across the country.

The disappearance of a well-respected businessman leads to an investigation that exposes a secret romance fueled by lust and greed.

An Amish community is turned upside down when a young wife and mother is found murdered inside her home, leading police to look deeper within the community, and exposing a secret romance that triggered a deadly conspiracy.

A beloved Oklahoma father is discovered murdered inside his home and the search for his killer uncovers a forbidden romance and a deadly double-cross.

A young couple becomes the target of a nationwide manhunt after police connect the deadly lovers to two grisly murders in different states.

A horrific killing spree leads Pennsylvania investigators on the hunt for two young lovers willing to do whatever it takes to evade the law.

The sudden disappearance of a wealthy couple rattles their small town and launches an investigation that exposes a web of deception, greed and a blood-soaked betrayal.

When a wealthy couple falls victim to a deadly home invasion, the search for the killers exposes both a twisted relationship and a family betrayal no one saw coming.

When a beloved grandmother falls victim to a brutal crime, the search for her killers reveals a torrid romance between two young lovers willing to do anything to get what they desire.

The unexplained disappearances of a young mother and her two sons in 1980 lead investigators on a three-decade quest for justice, exposing multiple murders and a homicidal love affair that left untold suffering and carnage in its wake.

A loving couple are found shot to death in their home, forcing police to pursue a pair of desperate lovers on a cross-country manhunt.

When a young woman is found tortured and killed after a camping trip with friends, police must unravel two couples' conflicting stories of depravity to bring her killers to justice.

The disappearance of a young socialite in Charleston prompts a team of private investigators to unearth a betrayal at the hands of her two best friends, one of whom is a con artist with a secret.

A respected and beloved chiropractor is found bludgeoned to death in his home outside Philadelphia; investigators take a hard look at those closest to him, but soon learn the murderer is someone they least expect.

A veteran police officer gets attacked in the line of duty; detectives make it their mission to bring his killer to justice; as they investigate a troubled Philadelphia suburb, they soon uncover a crime of the ultimate betrayal.

The security cameras at the home of a wife and mother of three's home may hold the key to solving the mystery of her disappearance.

A husband comes under suspicion after the disappearance of his wife.

Police investigate whether the murder of a South Florida attorney is connected to a web of fraud, betrayal and more than $1 billion in missing money.

The execution-style murder of a Fountain Valley wife and mother shocks the OC and leaves police with no leads on motive; the community bands together to find justice until a similar shooting reveals the truth behind a murder plot gone awry.

Keeping up appearances is key in the OC; the Stahls are found shot to death on the side of the Ortega Highway; the façade turns deadly.

Ed Bozarth lives life on the sea, but paradise turns deadly when the dashing adventurer is found dead on his boat in Key Largo; just below the surface, investigators discover a secret past, a life full of intrigue and enemies within.

When beloved ER nurse and mother Becky Bliefnick is found shot to death in her bathroom in Quincy, Ill., residents fear a killer has come to town; detectives discover this seemingly perfect Midwestern community has monsters of its own.

Family man and all-around nice guy, Trent Mallory is murdered in his sleep in rural upper Michigan; sorting through multiple suspects and motives, the police set a trap to catch his cold-hearted killer.

A look into the tragic last days of Bobbi Kristina Brown.

After being acquitted of double murder, O.J. Simpson's luck runs out after a bizarre robbery in Las Vegas is caught on tape.

A look at the lives and crimes of Aaron Hernandez, Bison Dele and Steve McNair.

A detailed look at Aaron Hernandez's life, a millionaire athlete with a fiancée and baby, convicted of murder; new details and never-before-seen interviews explain his troubled past and murder allegations.

Investigators paint a dark image of Hernandez through definitive interviews detailing their strong murder case against him -- including damning surveillance video from his home, business and residential areas.

Aaron's fiancée Shayanna and friends discuss the struggle accepting Aaron's new reality behind bars; through the murder trial of Odin Lloyd, sisters become torn apart and Aaron's conviction seals his fate.

Aaron Hernandez faces a new accusation, this time of double murder; in court footage and interviews, one of the country's best lawyers defends Hernandez; just as things start looking hopeful, Aaron's darkest secret is revealed.

When a beloved woman goes missing in Everett, Wash., police find that her apartment was the scene of a violent attack; unable to find her, investigators are led to a coven of modern-day wiccans and one witness who reveals the horrifying truth.

When two men disappear in the quiet community of Clemmons, N.C., rumors swirl about a devil-worshipping couple and their house of horrors; an investigation leads police to discover there may be more than secrets buried in the backyard.

Halloween turns into a real-life horror movie when a single mother is gunned down on her way home from trick-or-treating by a costumed killer in Florida; detectives uncover an unexpected witness that helps reveal the monster behind the mask.

When a loving father is shot to death in front of his home by a masked gunman on Halloween night, Los Angeles Police must follow the evidence to determine whether this was a case of holiday hijinks gone awry or something far more sinister.

When an Iowa mother and her newborn son are reported missing, police race against time to rescue the pair and stop a maniacal woman from enacting a dangerous plan.

Rumors spread through a small town in Indiana after a well-known resident is found dead in his home after hosting a party; authorities investigate accusations from the partygoers to expose how a toxic love triangle turned deadly.

Tragedy strikes a rural Nebraska town when a beloved high school volleyball coach dies in a fiery car accident; but as investigators reconstruct her tragic death, the resulting clues steer the investigation to reveal a horrifying series of events.

An apparent victim of an accidental drowning washes ashore on idyllic Cocoa Beach, Fla., but as investigators pull back the layers of the victim's personal life, a far murkier truth is revealed.

In the early morning hours after Valentine's Day, a man is found dead after an apparent drug overdose; but a jail informant gives investigators a tip that abruptly changes the case, and a deadly pattern of deaths in the family is revealed.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

Investigators seek answers when a prosecutor and a district attorney and his wife are murdered within a couple of months of each other.

Against all odds, a young woman is found alive after an attack on her and a friend near Corpus Christi, Texas.