In Florida, friends and family are stunned after an esteemed criminal law professor is executed in his garage; investigators follow a series of leads taking them on a statewide hunt in search of the murderous masterminds.

Over the span of decades, three women meet their deaths or go missing under mysterious circumstances, forcing authorities to examine the one thing they had in common -- they all fell in love with the same man.

Police question suspects in the inner circle of Jackie Galloway, a woman found strangled and bound with ritualistic knots; a chance encounter with a prowler leads them to the shocking discovery of a budding serial killer.

A brutal 1970 home invasion claims the lives of Army surgeon Jeffrey MacDonald's wife and daughters, leaving him the lone survivor; authorities doubt his story of murderous hippies and believe MacDonald committed the crime himself.

In 1969, a woman is found murdered in Los Angeles, but her identity is a mystery; for decades, police investigate hoping to put a name to the face and find her killer; the one lead that comes up over and over leads them to Charles Manson.

On a Mississippi back road, a 19-year-old woman is set on fire and left to burn alive; her last words lead detectives down a road of dead ends and the case goes cold until a special agent taps into her location data and finds a suspect.

In York, Pa., race riots claim the lives of an African-American mother and a young, white police officer; their deaths are largely forgotten until 30 years later when their cold cases are reopened, revealing the city's dark past.

Gallaudet University is the premier college for the deaf in the United States, but this haven of higher learning is turned upside down after two students are murdered in their dormitory rooms.

A young couple's toddler vanishes while the family is enjoying an impromptu camping trip in Leadore, Idaho; investigators and private detectives work around the clock to find the missing boy, only to come back to his parents.

In 1998, a gifted Philadelphia graduate student is found murdered in her bed, triggering a hunt for her killer.

A lone survivor is the only witness who can help police track down a serial killer known as the Grim Sleeper preying on women in South Central Los Angeles; after decades of searching, police hone in on an unlikely suspect.

Shock sweeps through a Washington community when a suburban mother gets arrested for a murder from a decade earlier in Alaska; details of a seedy and sordid past emerge.

A celebratory night turns deadly for the Whitaker family as they are gunned down at home; when investigators uncover a conspiracy, it will test one man's ability to forgive as he fights to save the criminal mastermind from the death penalty.

After a young couple goes missing, detectives find a clue leading them to a strange storage container in the middle of 95 acres, and what's inside unlocks the secrets of a monster hiding in plain sight.

In the summer of 1980, a popular teen goes for a run around her hometown in Maine and, days later, her savagely beaten body is found; what happened remains a mystery for years until her mother intervenes and forces police to re-examine the case.

In Grand Prairie, Texas, a game of truth-or-dare leads to a startling confession in the 1995 shooting death of 16-year-old Adrianne Jones.

One summer night in 2007, the Petit family is woken up by two strangers in their quiet Connecticut home; suddenly, these four family members find themselves being held hostage and in a fight for their lives.

When an 11-year-old Arizona girl vanishes while waiting for an ice cream truck, it's clear she's been abducted; the search for her leads to a trail of suspects, making it the largest missing child investigation in Arizona history.

In 2011, a 10-month-old baby girl goes missing from her home in Kansas City, Mo., and her family fears she's been kidnapped by a drifter, only to be accused by the police of being responsible for her disappearance.

In 1992, a 19-year-old woman is brutally assaulted outside of Desert Hot Springs, Calif.; miraculously, she escapes but lives in constant fear that her assailant will find her again one day, not realizing she has survived a serial killer.

In Craig, Ala., townspeople are shocked when police discover the charred body of beloved mother and wife Lauri Waterman; people have no idea who would want to kill her, then an unlikely witness reveals a sordid story of secrets and lies.

"Betrayed" reveals chilling stories of chasing the American dream and how the veneer can dramatically crumble, ending in murder at the hands of a trusted family member, co-worker, lover, or friend. The cases of deception are told through the lens of the fictionalized, first-person perspectives of the victims. As investigators, family, and friends peel back the layers and facts of each case, the otherworldly narrator already knows where the trail ends. The narrator guides viewers through various relationships, raising suspicions about who will commit the ultimate betrayal.

From the moment a homicide is reported, a file is assembled to document every facet of the investigation -- crime scene photos, notes and observations, forensic reports, witness interviews, suspect profiles -- and continues to grow with new information until an arrest is made and conviction attained. Investigation Discovery opens these "murder books" to tell haunting tales buried within the pages. Hourlong episodes take viewers back in time with details of decades-old cold cases using actual archival footage, crime-scene evidence and first-person interviews with lead investigators, unraveling the mystery and uncovering what broke the cases open.

"Accident, Murder, or Suicide" investigates the deaths that are just a little bit too mysterious. It explores the unbelievable true stories in this hourlong program. Each episode retraces the investigation from the start to the end. Investigators take viewers through the twists, turns, and unexpected surprises as they dissect the red flags, show evidence, and point out the strange behavior that puts everything into question.

The first three days after somebody is abducted are extremely important. Statistically, the chances of finding the abductee alive diminish significantly after the first 72 hours. "Three Days to Live" chronicles kidnapping cases, using re-creations and first-hand testimony from authorities and loved ones to illustrate what went on -- from the crucial periods early on in the cases, which all feature females who were taken, through the twists and turns the kidnappings took before reaching their conclusions. Journalist SuChin Pak narrates the hourlong series.