In a town like any other town, they were a family just like any other family surrounding themselves with people they could trust... or, so they thought. Things are not always as they seem in Betrayed, which revisits heart-pounding cases of deception that ended in murder at the hands of a trusted family member, co-worker, lover, or friend. Told through the lens of the fictionalized, first-person perspectives of the victims, Betrayed treats the viewer like the only confidant they have left. As investigators, family, and friends peel back the layers and facts of each case, the otherworldly narrator already knows where the breadcrumb trail ends. They guide viewers through the various relationships that comprise their life, raising suspicions about who will commit the ultimate betrayal and bring about their doom.

Some of the world's most notorious murders are the subject of It Takes a Killer which investigates the crimes from the perspective of the killers, trying to get inside their minds and determine their motives. Leading homicide investigators and experts from such agencies as the FBI and Scotland Yard take a look at the evidence pulled from crime scenes and profile the killer's behavior to try to piece together the details of each murder, explaining when, why and how each criminal committed the crime. For the wannabe detectives watching the show, the experts also reveal how the crime was solved -- which often requires authorities to think like a killer.

Policewomen Files is a gripping series that chronicles the true stories of complex murder cases solved by policewomen. Witness their challenges, setbacks, and dramatic revelations as they piece together homicide investigations.

On the surface, Chillicothe, Ohio is the epitome of quintessential Middle America. But this home in the heartland was catapulted into the national spotlight recently for a much darker claim to fame: a string of six young women have gone missing or been found dead in the past year and a half. The women, all in their 20's and 30's, are believed to have known each other and all have ties to the dark underbelly of this small town, leading the local community to fear a serial killer on the loose. With unprecedented access, Investigation Discovery (ID) has teamed with law enforcement, loved ones of the victims, and the community to document the investigation as it unfolds in an effort to bring further attention and help in solving these open cases. As ID's first serialized docuseries, the six-part series The Vanishing Women will premiere on Monday, June 6 at 10/9.

The six-part series is to feature firsthand accounts from the key players involved in American criminal and murder cases that have struck college campuses across the country. In addition to first-person testimonials, the series will offer in-depth interviews with faculty, family and friends of the victim.Each episode of the series will tell the story of fatal crimes committed by unsuspecting culprits, from a tale of young romance gone wrong at the University of Florida to troubles on a college debate team at Samford University in Birmingham, Alabama, and fallout between fraternity brothers at the University of Maryland.

Using re-creations and first-person interviews, Murder Among Friends chronicles the stories of killers and their accomplices.

A look at murders that were callously planned and premeditated, with 999 calls reporting the crime as an accident.

The series explores some of the country's most despicable crimes, includes interviews with the families of the victims, the victims and the police officers involved.

#killerpost profiles true stories of the most jaw-dropping and shocking cases where social media activity has had dangerous and deadly consequences. Although the crimes differ in nature, they all share a common theme – social media posts were the catalysts for deadly repercussions. Through cinematic reenactments of both the crimes and stories behind them – coupled with witness testimonies and expert interviews – each pulse-pounding episode will feature extreme cases in which a post, a poke or even a tweet led to a violent and even deadly result. From a seemingly innocent online connection that ends in homicide to an online feud between best friends that leads to a public physical altercation, viewers will witness how the boundaries between the real and online world are breaking down with shocking results and sometimes fatal outcomes.

How well do you know your housemates? Evil Lives Here tells the heart-stopping tales of people who have shared a home, with a killer. In each episode, loved ones reveal how they came to discover their significant other's evil side.

With narrative driven exclusively by the detectives themselves, each episode ventures deep into the mind of a homicide detective as they describe in vivid detail the one case forever ingrained in their memory.

Shadow of Doubt is a presentation of competing theories of complex cases, as participants point fingers at each other.

Behind bars in Britain are some of the most dangerous people the country has ever known. Killers—men and women—who have killed and killed again to satisfy their own dark desires, often targeting the most vulnerable members of our society. But who is the worst of the worst? Can we create an index of evil? Criminologist, Professor David Wilson, has developed a unique system that he believes can Measure Evil, and by doing so, countdown to reveal just who is the most dangerous killer alive in Britain today only on Measuring Evil: Britain's Worst Killers.

What are the tell-tale signs of a serial killer in the making? Inside the Mind of a Serial Killer reveals what makes them tick and uncovers the trademark signs for spotting murderers in the making.

Investigation Discovery presents the modern-day Clarice Starling as Dr. Michelle Ward goes behind bars to interview violent murderers and offer insight into what drives people to kill with the new series The Mind of a Murderer premiering Thursday, February 19 at 10/9c. From her early doctorate research on psychopathy, to her ongoing study of criminal behavior, Dr. Ward possesses a unique ability to push murderers to the limit, getting them to admit things they wouldn't confess to anyone else. She is trained to go beyond excuses and get to the psychological core of why people commit heinous acts - and she does it alone in a room, face-to-face with coldblooded killers.

See No Evil pieces together the truth when shocking surveillance footage reveals breakthrough clues to solve a murder.

With only 15 percent of homicide detectives in the U.S. being women, the working lives of female detectives are not as well documented as those of their male counterparts. Inside Homicide takes a ride along with three female homicide detectives who work in the Cincinnati and Atlanta areas, conveying the high intensity of working the homicide unit in real-time. With dogged determination, Detectives Summer Benton, Jenny Luke and Jennifer Mitsch work relentlessly to bring closure to victims' families. From the actual 911 call to on-site questioning with witnesses and even real interrogation footage with suspects, viewers dive into the raw and gritty action that's part of these women's everyday lives.

When tall, dark, and handsome turns jealous, controlling, and sneaky, Investigation Discovery's Handsome Devils exposes the secrets of real life lady-killers- men who will have you on top of the world one minute, and six feet under the next.

Through the eyes of the people placed right at the heart of the tragedies, the six compelling episodes uncover the biggest crimes to hit our country. Through gripping interviews, drama reconstructions and archival footage, piece together the murders that shocked our nation. The detailed events leading up to the crime, the crime itself and the aftermath will be revealed.

A sudden, brutal murder will traumatize any community, but when it strikes in a small close-knit town, the effect is devastating. From the rural backwaters of Appalachia to the lonely desert climes of the southwest, Murder Comes to Town uncovers the shocking murder mysteries that haunt small town America and the dark secrets that lie just beneath the surface of even the most idyllic community. Following the first person accounts of investigators and townsfolk, each hour-long episode unravels the wild rumors and terrifying truths behind an unthinkable crime and the dark legacy it leaves behind. Illustrated through moody, cinematic recreations, Murder Comes to Town follows police as they put together each clue and attempt to bring the perpetrator to justice.

In a 21st-century world, we're increasingly living our lives online, sharing everything in one quick click from vacation photos and observances of daily life to breaking news stories and expressions of our deepest insecurities. It's easy to ignore or forget the millions of people who suddenly have access to your life online, but behind the clever screen names and witty captions hides a dark digital world with real dangers and risks.

Countdown to Murder is a documentary series that takes a close look at some of the country's most high-profile murder cases.

Each episode follows a multi-layered investigation in which police officers, Civil Aviation or Maritime New Zealand investigators and ESR scientists have worked together to unravel the truth. A New Zealand diplomat is discovered dying from a single stab wound, in a supposedly secure residential compound in Honiara – leaving a crime scene that baffles investigators. Two people lose their lives when a home built plane plummets into the Kaipara Harbour minutes after take off – but why was the experienced pilot so disoriented he couldn't pinpoint his location the night before? A young Japanese student is found floating in a river in Christchurch metres from his home stay address – tragic mischance or foul play?

Against a backdrop of Southern hospitality, etiquette, and Christian values, evil creeps in like vines on a time-worn plantation. Southern Fried Homicide proves that ugliness lurks behind beauty when cracks in good ol' moral values give way to cold-blooded murder. Actress Shanna Forrestall, a native of Louisiana, serves as the gatekeeper to these salacious stories from south of the Mason-Dixon Line.

From the swampy bayou of Louisiana to the Great Lake o' the Cherokees in Missouri and even rivers and lakes in Georgia, Texas, and Florida, Swamp Murders proves that even muddied waters eventually bring secrets to the surface. The premiere episode on June 4 at 10 PM profiles wholesome 19-year-old Kathy Bonney. When Kathy doesn't come home one day, her concerned father, Tom, turns to police for help. But when Kathy's bullet-ridden body is pulled from Virginia's Great Dismal Swamp, detectives discover that Kathy wasn't as angelic as everyone was led to believe - and her father wasn't as clueless as he let on.

Evil-in-Law is a program highlighting meddlesome mothers bent on driving the decisions of their married sons. While their sons insist they have good intentions, their wives seem to think differently.

Snapped: Killer Couples features couples whose passion drives them to commit terrible criminal acts. Through recreations and gripping firsthand accounts, each episode takes a deep dive into the stories behind the couples' romance, how their relationship evolved once love turned into manipulation and what ultimately drove them to commit the crime.

When marriages fail, divorce can turn ugly - even, deadly: what was once a passionate union becomes plagued by spite, greed, betrayal and, literally, backstabbing. Each episode explores tumultuous, shocking, and disturbing divorces, and delves into the criminal psychology behind what actually happens when one spouse determines that the only way out is murder. Guiding viewers through these crimes of passion are Dr. Brian Russell, an attorney as well as a forensic and clinical psychologist, and Stacy Kaiser, a licensed psychotherapist and relationship expert. In each episode, the two experts examine the couple featured and provide analysis on marriages that break down to the point that divorce and murder collide.

Channeling sibling rivalries and deadly childhood pacts, Evil Twins follows true-crime mysteries surrounding cases of these double-duty archetypes. Each episode reveals a pair of sinister siblings: twins who tag team to kill together, twins who turn on each other, and even the good twin versus the evil.

From the outside, families seem like harmonious units in loving homes. But you don't necessarily know what secrets families are hiding from the outside world. This series, narrated by actress Brenda Strong, explores families hiding the most extreme of family secrets: murder.Each episode of Blood Relatives explores a death in a family, unraveling the motives of the family members, all of whom are potential suspects -- and potential victims. Sibling rivalries, disputes over family businesses and infidelity are some of the factors that lead to the families' ultimate betrayals.

Werner Herzog continues his investigation of prisoners awaiting execution after his documentary Into the Abyss. This series first aired in the United States, and was rebroadcast in the UK with the exception of the episode on Linda Carty.

In Investigation Discovery's new series Dark Minds, non-fiction crime author M. William Phelps and criminal profiler John Kelly revisit unsolved homicides believed to be the work of serial killers. Joining them in the hunt for answers is an unlikely and anonymous source: a convict serving multiple life sentences for a series of murders. Known only to audiences as "13″, the source offers his "expert opinion" about potential motivations behind these chilling cold cases, using his own personal experience to formulate theories. Featuring crimes that echo the horrors of the infamous Green River Serial Killer, The Hillside Strangler and the BTK Killer, Dark Minds brings fresh eyes to unsolved serial killer investigations using the combined instincts of three unique perspectives.

The Devil You Know delves into the secret lives of men and women who masquerade as law-abiding citizens but, behind the charade, are hiding deadly intentions from their loved ones. As each story unfolds, family and friends give first-hand accounts of the unimaginable betrayal that left them in the dark. These harrowing personal testimonials take viewers on a twisted journey as witnesses wrestle with the demons and devils they have come to know all too well.

This series takes an in-depth look at some of the world's most prolific serial killers and interviews those who were closest to them before learning about their secret, dark lives.

True Crime with Aphrodite Jones features Jones delving into some of the most heinous murder cases and crimes of our time.

Led by Emmy Award-winning journalist Paula Zahn, On the Case features in-depth interviews and original reporting that go beyond the headlines in search of fascinating mysteries from within our nation's justice system. Each episode is highlighted by Zahn's riveting exclusive interviews, which draw out different viewpoints from the people personally connected to tragedies that rocked their local community and the investigations that attempted to piece together the truth On the Case with Paula Zahn.

Hell hath no fury like a woman scorned, especially when she's on a mission to murder. Deadly Women investigates the motives and modus operandi of female murderers. While males are often driven by anger, impulse and destruction, women usually have more complex, long-term reasons to kill. Through dramatized reconstructions the series investigates the driving force behind female thrill killers. What turns love affairs into fatal attractions. How twisted minds and dark secrets send other women on murdering rampages. Deadly Women also investigates the most ruthless female killers of them all-predators. Tune in as experts sift forensic fact from fanciful fiction. Former FBI agent and profiler, Candice DeLong offers insights into the psychology of female killers, while Dr Janis Amatuzio, a Mid West forensic pathologist known as "The Compassionate Coroner", provides expert commentary on the tell-tale evidence that Deadly Women leave behind. They are history's most intriguing and horrifying women. A sisterhood whose crimes are written in blood on history's pages.

Each year, approximately 16,000 people are murdered in the United States. 7% of the killers are female.*Who are these women and what drives them to kill? Oxygen's hit true crime series, Snapped, profiles the fascinating cases of women accused of murder. Did they really do it? And, if they did, why? Whether the motivation was revenge against a cheating husband, the promise of a hefty insurance payoff, or putting an end to years of abuse, the reasons are as varied as the women themselves. From socialites to secretaries, female killers share one thing in common: at some point, they all snapped. Snapped is produced in conjunction with Jupiter Entertainment, the creators of City Confidential and Dominick Dunne's Power, Privilege & Justice, and narrated by veteran news reporter Sharon Martin. Each episode of Snapped chronicles the life of a woman who has been charged with murder. These shocking but true stories turn common assumptions about crime and criminals upside down, and prove that even the most unlikely suspects can be capable of murder.

48 Hours is a CBS news magazine that investigates intriguing crime and justice cases that touch on all aspects of the human experience. Over its long run, the show has helped exonerate wrongly convicted people, driven the reopening -- and resolution -- of cold cases, and changed numerous lives. CBS News correspondents offer an in-depth look into each story, with the emphasis on solving the mystery at its heart. The program and its team have earned critical acclaim, including 20 Emmys and three Peabody Awards.

20/20 continues to combine hard-hitting investigative reports, newsmaker interviews and compelling human interest and feature stories.