TV Guide Investigation Discovery Saturday

Trina always had a tough childhood, but it becomes a nightmare when her mother brings home her new boyfriend, Robert, who is controlling.

Featuring the story of the Pom-Pom Mom who hired a hitman to kill her daughter's cheer rival, and her daughter reveals the shocking secret behind what happened.

A woman and her younger brother always had a troubled relationship, but she fears that he will return to finish what he started over two-decades ago.

After 14-year-old Christie Mullins was murdered, it remained unsolved for 40 years until a young woman came forward and identified her uncle as the killer.

After Trudy Darby is abducted and murdered in Macks Creek, Mo., on January 19, 1991, two more local women go missing and police fear it is a serial killer.

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

The deaths of two gay men in New York City shatter their families and the gay community, leading the NYPD to uncover a ruthless gang that murders their victims.

Ocala, Fla. sheriff's office responds to a wellness check only to find the body of a man in what looks like a sexual pleasure palace.

In 2001, someone murders a father, setting his Florida home ablaze, and his sons disappear and hopes rise for their safe return.

A wellness guru promises cures through clean living, but patients at his ranch endure unsterile care, false hope and dangerous treatments.

A shared cheesecake leaves a woman near death; as detectives link her case to another poisoning, they uncover a fugitive using charm & a rare sedative to rob.

A celebrity facialist says a stalker torments her in L.A.'s brutal beauty world. As her story unravels, so do her lies until police reveal the shocking twist.

A celebrity facialist spirals after online attacks and stalking she believes are by a rival, and her supposed tormentors turn out to be friends.

In February 2008, Ben Oxley is shot in the head at point-blank range while sleeping in bed, and his wife becomes the focus of the police investigation.

A teenager sleeps through the murder of her father, Ken Eaton, at their home, but then detectives probe into the teacher's secret love life.

In June 2009, 61-year-old Wendy Di Rodio's elderly mother discovers her body in the bedroom of their shared Ventura County, Calif., home.

In Palm Beach, Fla., detectives discover a pregnant mother of 3 murdered in her sleep, and they delve into her extensive use of social media.

After Greg Fleniken checks into a Texas hotel, police find him murdered in his sleep, but when the case runs cold, a Long Island PI joins the investigation.

When a home invasion leaves Bill Ross murdered in his sleep, detectives in Shelbyville, Tenn., scramble to uncover the identity of a pair of masked men.

In the 1980s, a murderer enters the inner circle of a woman named Joan Bent, who manages a cleaning staff at a local hotel and has a loving husband at home.

When Tara Lynn Grant goes missing in Michigan in 2007, the police can find no trace of her until a gruesome discovery turns the case into a statewide manhunt.

A 20-year-old woman, who is a devout Christian and saving herself for marriage, attracts the wrong type of men that later leads to a deadly outcome.

Newlywed pharmaceutical rep Debbie Ashley turns up dead in her car trunk in a mystery ensnaring her ex-husbands and her daughter's shadowy boyfriend.

A single mother believes she's met the perfect match, but she's ultimately confronted by his ex-lover, and a series of events leads to her murder.

As a 27-year-old single mother starts a new company and battles for custody of her two children in Raleigh, N.C., she meets her untimely demise.

A beautiful single woman relies on the kindness of strangers at her new church to make a place for herself in the world, but one stranger betrays her.

In Jacksonville Beach, Fla., an investigation is conducted when a 25-year-old woman living on her own is found brutally murdered in the middle of the night.

When two of the most prominent citizens of Biloxi, Miss., get shot to death in their home, their oldest daughter sets out on a mission to find the murderer.

In the midst of America's farm crisis during the 1980s, a mass murder in a Missouri farm town kills an entire family and the unlikely suspect is a teenage boy.