Dance Floor Killer

Jack Manville hosts an Investigation Discovery episode of The Killer Files about Marc Allen Henry, the "Dance Floor Killer," who murdered dozens of people between 1982 and 1997 while hiding in plain sight. Grainy archival clips show Henry standing motionless and unsmiling among exuberant dancers on Dance Party USA and Soul Train, a taped threat to police is undercut when someone calls him back out to dance, and MTV even hands him his own dance segment, where he finally blurts out who he is on live television. Manville signs off by noting that after his prison sentence Henry has been cast on Dancing with the Stars.

The fake archival dance clips are set to period hits including The Escape Club's "Wild Wild West," Rob Base & DJ E-Z Rock's "It Takes Two," E.U.'s "Da Butt" and Marky Mark and the Funky Bunch's "Good Vibrations." On-screen captions spell the killer's first name Marc; SNL Archives lists him as Mark Allen Henry.