TV Guide Investigation Discovery Thursday

After a night out in town, 27-year-old Gretchen Fleming is last seen leaving a local bar in W. Va., with a mystery man and is never heard from again.

The Always Hope adoption center falls under suspicion of multiple families who are all left heartbroken after their adoptions fall through.

In 2015, Jerrica Laws vanishes from her home in Park Forest, Ill.; as Detective Pam Childs reopens the case, she uncovers Jerrica's secret world.

After a night out in town, 27-year-old Gretchen Fleming is last seen leaving a local bar in W. Va., with a mystery man and is never heard from again.

A motorist shoots dead Whitney Gray while she shops with her young kids and teenage niece, so detectives follow a trail of CCTV to track down the suspect.

When the family of Sharon Garrison, of Breckenridge, Colo., report her missing, investigators search for clues and the evidence suggests she's skipped town.

When Robin Sowders is brutally beaten in his home in Bloomington, Ind., his wife turns up at the police station and the investigation is turned upside-down.

A family man falls dead in his living room during a robbery and CSI Alina Burroughs deciphers the ballistics to give a silenced victim the final word.

C.S.I. Alina Burroughs is eager to determine whether Michelle Witherell accidentally fell from her balcony, committed suicide, or was murdered.

CSI Alina Burroughs investigates the murder of Peggy Hettrick, and with the help of a new DNA technique, Alina works to let Peggy tell her story.

Tim Bliefnick said his biggest mistake at his wedding was saying I do, but years later when amid a divorce, his wife, Becky, was shot 14 times in her home.

Crime scene investigator Nicole Lenway was shot in broad daylight, and even though she miraculously survived the identity of her assailant remained a mystery.

When a woman calls 911, she says that her son is unconscious, but when the police arrive, they discover that he has been strangled to death with his hands tied.

After seeing his friend shot and killed, a traumatized man calls 911, investigators have to uncover the truth out of a long list of untrustworthy suspects.

After two young girls from two neighboring counties disappear and are found murdered, one family continues to receive malicious phone calls from the kidnapper.

The former mayor of Powhatan, Ohio, turns up dead in his hunting cabin; Detective Ryan Allar and his team begin the search to investigate.

A home health care aide's body floats in a rural Connecticut creek, and detective Garritt Kelly joins the investigation to bring justice to a community.

Det. Ben Endreson investigates a missing daughter from a Colorado house and an unusual suspect comes forward to confess her involvement.

Two women make horrifying discoveries on their doorstep, ominous death threats and trash bags filled with severed human parts and Det. Flavell is called in.

A missing wallet and a pair of jumper cables sends investigator Greg Hagwood on a multi-state manhunt for a deranged killer who knows no bounds.

A dismembered corpse is spotted floating in Thunder Bay and Detective Thompson must identify the victim before he's tasked with unraveling a vexing mystery.

A 16-year-old girl vanishes after attending a high school party in California, and the mystery leads to speculation that her parents are somehow involved.

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

In November 1991, a young boy leaves home to check out a local brush fire that was capturing his neighborhood's attention and never returns home.

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

In November 1991, a young boy leaves home to check out a local brush fire that was capturing his neighborhood's attention and never returns home.

A 16-year-old girl vanishes after attending a high school party in California, and the mystery leads to speculation that her parents are somehow involved.

When a nine-year-old disappears while delivering cookies around her Nashville, Tenn., neighborhood, it takes more than 30 years for her fate to be revealed.