Snapped: Killer Couples

Catherine Sykes disappears after a midnight drive with Professor Andrew Gentling . When she's presumed murdered, his friend Martha convinces him that he's a prime suspect and should investigate before he's arrested.

An apathetic police unit brings in a mysterious young woman to help solve a grisly homicide.

Jack, a Palm Beach detective, becomes involved in a case of multiple murders. All the women can be linked to Jack in some way. Jack and his partner have no leads, but numerous suspects. The murders continue, along with anonymous letters from the killer.

Mary Giordano is a bright, intelligent student who goes to a catholic school. She also has an addiction to mystery novels and detective magazines, which inspire her to do her own detective work. When she starts snooping around on the case of a murderer of teenage girls, it gets her in hot water with her mentor Detective Jerry Gunn. But it also starts a team up with police cadet Tony Campbell. The two work together to find the murderer. But the closer Mary gets to solving the murder, the more danger she puts herself in of being the next victim.

A Montreal police inspector cracks a murder case with clues from the victim's diary.

Homicide cop Rita Cates takes a murder case where the victim is a Las Vegas stripper. The investigation immediately takes a perverse turn when she discovers the prime suspect: a psychotic ex-cop with whom she once had a torrid affair. That initial affair drove Cates' husband to suicide, but it doesn't stop her from picking up where she left off. In the heat of passion, she jeopardizes the case, her career and her life.

A veteran New York City Police Lieutenant's investigation of a woman's murder uncovers corruption in high places.

Just as her life is coming together, Allison experiences a terrible tragedy when her boyfriend is murdered by an intruder from whom the woman herself barely escapes. The police capture a man they believe to be the killer, but Allison, still unsettled, has her doubts. Things take a frightening turn when she meets her friend's new boyfriend and suspects him to be the killer.

British journalist Trevor McDonald revisits the Cromwell Street "House of Horrors"; one of the most disturbing and depraved crime cases in the UK.

A white female detective is partnered with a black male detective to find the person who is committing a series of particularly vicious murders. During the course of the investigation the two begin to develop an attraction to each other, but the situation is complicated by the fact that he is married.

More than 25 years after her murder, mystery still surrounds the infamous case of JonBenét Ramsey, who was killed inside her family's home in Boulder, Colorado in the early morning hours just after Christmas. This documentary explores the unsolved crime with unprecedented access and family cooperation from John Ramsey, JonBenét's father, who after finally being cleared as a suspect, continues to push the Boulder Police Department to re-test and make available key pieces of physical evidence which may hold the answers to the killer's identity.

He's the deadliest weapon on the battlefield, but his next shot could be his last. Outnumbered - Outgunned - Behind enemy lines - What happens when the tables are turned and the hunter becomes the hunted? This is SNIPER: DEADLIEST MISSIONS. From the treacherous jungles of Vietnam and the bloody war zones of Iraq, to danger high in the skies of the Alaskan wilderness, this two-hour special puts you behind the scope with the men who pulled the trigger on some of the deadliest missions in military and law enforcement history. Gripping firsthand accounts, 3-D graphics and jaw-dropping shooting demonstrations take you inside the shadowy world of top snipers and the missions that made them living legends. Outmanned and out-gunned - will the next shot be their last?

Love Me Do is a twisted love story which follows the relationship between a female investment banker and an out-of-work actor. As the couple learn to bridge their differences and fall in love, a romantic bond develops, which drives them to commit a terrible crime.

Explore the first – and only – time “demonic possession” has officially been used as a defense in a U.S. murder trial. Including firsthand accounts of alleged devil possession and a shocking murder, this extraordinary story forces reflection on our fear of the unknown.

When Jennifer Pan calls 911 to report that her parents have been shot, she becomes the primary focus of a captivating criminal case.

The fascinating cases of every day, seemingly average moms, wives and girlfriends accused of murder. Did they really do it? And if so, why?

There are consequences when BFFs - short for best friends forever - turn into frenemies. Episodes showcase true stories of intense friendships - and, in some cases, more than that - taking a bad turn that results in the most tragic ending possible for at least one person involved in the relationship. The show serves as a reminder to viewers that not even the best of friends keep that status forever.

When marriages fall apart, divorce can turn ugly - even deadly. From blushing brides turned cold-blooded killers to smitten grooms with shocking dark sides, the criminal psychology behind deadly divorces is examined. Guiding viewers through actual stories of love gone wrong are psychotherapist Stacy Kaiser and forensic psychologist Dr. Brian Russell, who analyze each couple to better understand how the marriage turned from flawed to fatal. .

"The Perfect Murder" brings viewers some of the most diabolical, perplexing murder cases to land on detectives’ desks – the kind of cases that make or break careers and provide fodder for Hollywood mystery movies. These ingenious killers are every detective’s worst nightmare. Whether by planting false evidence, or writing anonymous letters to police, these murderers will stop at nothing to stay one step ahead and get away with the perfect murder. In this program, we focus on the investigation, as detectives slowly put the pieces together to unravel the twisted truth. As detectives uncover new evidence, and turn to new suspects, we flashback through stylized reenactment, to depict each possible theory of what may have happened. For the killer, it’s THE PERFECT MURDER. Detectives hit dead end after dead end, and wrong suspects are discarded. But one new clue can lead to another and the cold case suddenly gets hot. Truth is, it’s the perfect murder... until it’s not.

Each pulse-pounding hour-long episode centers around an incredible and dangerous romance. Shocking crime, kidnapping or even murder is only half of the story! In the end, the “true love” that draws these couples together isn’t the kind that celebrates silver anniversaries – instead it leads to cross-country manhunts, bizarre cover-ups and dramatic trials. Driven by powerful, real-life stories, Fatal Attraction weaves together intimate, first-person interviews, exclusive interrogation footage and rare archival material. Along the way, it gives you a glimpse into the dark heart of a dangerous romance. Listen as the key players, family of the survivors and those that investigated the horrific crimes reveal the secrets to each sordid tale. Fatal Attraction… because love doesn’t just hurt, it can kill!

For more than 25 years, Dateline has brought viewers investigations into some of biggest mysteries in America. This entry in the franchise takes a second look at some of the most mysterious cases of recent history. It explores 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.

World’s Most Evil Killers delves into the gripping real-life stories of the world’s most terrifying and prolific killers. From Fred and Rose West to Ed Gein – The Clown Killer – and even to The Milwaukee Cannibal. Each episode focuses on one notorious killer and features authentic first-hand accounts of their behavior, from detectives who ran the case, journalists who reported on the stories, relatives, and at times survivors, alongside series experts who provide analysis. These criminologists, crime journalists and psychologists examine how the infamous killers made headlines both nationally and internationally and why they still continue to evoke fear and fascination in the public eye.

Delve into the most haunting cases of homicide detectives' careers. Each episode takes viewers on an emotional rollercoaster ride to the front lines of the investigation, retracing their first steps on the crime scene to the final bust and the emotional aftermath that they still carry today.

All serial killers commit murder to satisfy their grand fantasies, but the murderers featured in this true-crime docuseries take it one step further, committing heinous acts that allow them to extend their fantasies and relive the excitement of their crimes again and again.

Witness the unboxing of real case evidence while hearing from the actual investigators, prosecutors, and witnesses. Full of twists and turns, each episode will connect the dots of seemingly unrelated evidence to tell the story of what happened.

Across the country, high school football unites small-town communities. But when a heinous murder shatters that Friday night dream world, the crime ripples beyond those immediately impacted, and the community will never be the same again.

Faith Jenkins investigates burgeoning romances from their sweet beginnings, and follows what happened all the way through to their bitter endings. With her background as a criminal prosecutor in the Manhattan District Attorney's Office, and her expertise in matters of the heart, Faith gives her professional POV of the nightmarish cases. With firsthand accounts from victims' family, friends and law enforcement, each episode reveals the inner workings of intimate attachments that seemed fated to last forever and ended in murder.

Whether it's a cheating ex, a double-crossing co-worker, or the best friend who stabbed you in the back, it's human instinct to want to get even. Though most people don't act on this impulse, there are those who are consumed with getting even. For them, what starts as a nagging bitterness evolves into obsession and results in murder. This true crime documentary series profiles those stories of revenge, told through gripping interviews with the family members, community members, and law enforcement who experienced the events firsthand.

These chilling stories of murder hit terrifyingly close to home -- each a real-life tale about the last thing anyone wants to find in their basement, a dead body. Every episode will make one think twice before ever stepping foot in the basement again.