TV Guide Investigation Discovery Tuesday

Questions and accusations fly after savvy entrepreneur and mother of five, 52-year-old Dee Warner, vanishes from her rural Michigan home.

Religious leader Gene Spriggs creates a movement in Tennessee with teenagers and disenchanted hippies called the Twelve Tribes.

Questions and accusations fly after savvy entrepreneur and mother of five, 52-year-old Dee Warner, vanishes from her rural Michigan home.

Retired drama teacher Kathy Gillcrist discovers that the police want her father for one of the most infamous mass murders in Maryland state history.

After Navy officer Allen R. Schindler is beaten to death in Japan in 1992, for being gay, his mother goes on a desperate search to learn who murdered her son.

When socialite Doris Angleton was shot 13 times at her Houston home, the police assumed that she had been killed by one of her husband's underworld rivals.

When truck driver Bob Nelson fails to show for his 25th wedding anniversary, the cops discover his abandoned truck and a crime scene that raises questions.

While Dr. Gulam Moonda and his wife, Donna, were on a house hunting trip along the Ohio Turnpike in Spring 2005, a gunman shot the prominent doctor to death.

When a mother of three takes a trip to the casino is a chance to escape for some fun, her journey is cut short and she fails to return home.

When 20-year-old college student Kristy Ray is kidnapped from her home in rural Mississippi, local law enforcement gets help from the FBI and community members.

30-year-old single mother Kaye Robinson, turns a suspicious late-night stranger away from her door, not knowing that the threat to her family is far from over.

After Tanya Petro of Lake Elsinore, Calif., met Ronald, she fell helplessly in love with him, but she was reported missing on January 7, 2011.

The truth behind one of the most prolific serial killers is revealed through hundreds of hours of police footage, as the victims are still being found today.

Christina Thomas believes her brother, John White, the first time he nearly kills a woman, and she forgives him when he murders another, but it happens again.

When a hole appears in the backyard, Delila Yang gets suspicious and she knows that her mother, Karina, dug it and knows someone is missing.

Ainjil thought William was charming and creative, then his dark fascinations and violent tendencies emerged, then Ainjil finally got away from him.

Jason Worley meets Brandi, but he's unaware she's made plans to ensnare and control him, but when he realizes he's fallen into her trap and tries to escape.

As a child Joy believed her mother, Anna Young, was the voice of God; in their isolated church community, Anna punishes anyone who breaks her rules.

LaTonya believes her husband Nathan is her best friend, but over the years she suffers emotional abuse at his hands and decides to take their kids and leave.

Misty fears her brother, Patrick Boggs, and his ex-girlfriend Lena now fears him too, so they both feel lucky to have escaped him with their lives.

When Letisha meets Phillip, his charm lures her in, but when his dark side emerges, Letisha finds herself trapped with a monster.

An illicit tryst in Alaska results in two dead bodies and a woman with multiple shot wounds; proof that affairs rarely end well.

Christina meets Loren, but Christina thinks she's the lone target of his rage until a trail of clues reveals that Loren and his best friend are serial killers.

When Letisha meets Phillip, his charm lures her in, but when his dark side emerges, Letisha finds herself trapped with a monster.

An illicit tryst in Alaska results in two dead bodies and a woman with multiple shot wounds; proof that affairs rarely end well.

Christina meets Loren, but Christina thinks she's the lone target of his rage until a trail of clues reveals that Loren and his best friend are serial killers.

Misty fears her brother, Patrick Boggs, and his ex-girlfriend Lena now fears him too, so they both feel lucky to have escaped him with their lives.

After 10-year-old Holly Jones vanished from her home in Toronto's west end on May 12, 2003, a bag containing body parts washes up on the Lake Ontario shore.