Find out how investigators figured out that Stacey Schoeck conspired with two others to carry out the murder of her husband, Richard Schoeck, in Georgia.

Stacey Schoeck speaks to investigators, who notice a few odd things about her demeanor in the wake of her husband's death.

Season 3 Preview: 19-year-old Alisson Alvarez was loved by her family and friends, leaving them shocked when she disappeared.

Learn more about Britney Ujlaky, 16, who vanished after getting a ride from her friend Bryce Dickey and was later found dead ...

See the trailer for Peacock's new documentary, The Gilgo Beach Killer: House of Secrets, premiering this June.

Preview: The upcoming 3-part documentary takes viewers inside the home of accused killer Rex Heuermann and features conversations with those closest to him.

Find out why Muhammad Altantawi, 16, killed his mother, Nada Huranieh, and then threw her out the window of their Farmington ...

An airport worker tells police about an encounter with a distraught woman matching Alisson Alvarez's description.

Police find tire tracks that do not match those on Richard Shoeck's car.

Find out more about the latest developments in the case of missing mom Crystal Rogers, last seen in July 2015.

Find out more about the arrest that took place at Beanie Babies billionaire Ty Warner's Montecito, Calif. home.

Learn more about the crimes of murderer William "Bill" Suff, as told in Oxygen's Unknown Serial Killers of America.