Florida authorities search Hernando County ranch for possible additional victims linked to convicted serial killer Billy Mansfield after alerts.

Police have linked the unidentified serial killer to five victims, though they believe the number could be as high as 16.

A German palliative care doctor described as a "serial killer" has been sentenced to life imprisonment for the murder of 15 ...

Retiring Baton Rouge prosecutor Dana Cummings reflects on the serial killer cases that changed policing and daily life across south Louisiana.

Detectives have investigated whether the slayings of two Akron women may be linked. An Akron detective thinks a third murder ...

This entertaining three-part docuseries follows a Tennessee high-school class as they investigate a series of unsolved crimes from the 1980s known as the Redhead Murders.

A new technique could lead to the big break that investigators need in the Nancy Guthrie case. New DNA methods using rootless hair could aid the Nancy Guthrie disappearance investigation. Technique ...

Hulu is revisiting one of the largest unidentified human remains cases in the United States, second only to 9/11, in "Return ...

In a stunning development in the Fox Hollow Farm murders case, the documentary Return to Fox Hollow: New Victims, Darker ...

'Happy Face' killer Keith Jesperson hints Rex Heuermann may have more victims in prison letters ahead of Gilgo Beach murderer's June 17 sentencing.