A beloved grandmother is found dead under mysterious circumstances - could a romantic rival have been her killer?

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

A Valentine’s Day rendezvous in an Atlanta-area park turns deadly, and investigators race to find the killer of a beloved husband and cub scout leader. When detectives reveal the mastermind behind the ...

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

A young woman steps out of her local deli only to be never seen again. When she’s reported missing days later, detectives from Staten Island find themselves mired in a maze of suspects and tracing her ...

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.

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

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