John Wayne Gacy

Francis Wayne Alexander is the third of six unidentified victims found in the infamous serial killer's crawl space. 

The year serial killer John Wayne Gacy was arrested for killing young men and boys, many of which were dismissed as runaways when they vanished, Dennis Nilsen began targeting similar victims in London.

It's unclear if the new owners are aware that their home is the property where John Wayne Gacy tried to hide 29 bodies.

The notorious sex trafficking ring operator John David Norman's closest associate, Phil Paske, had worked for John Wayne Gacy — but was Norman, a known sex offender, involved in the Gacy's crimes, as the serial killer suggested?

Sam Amirante's first paying client as a private attorney was an infamous one.

Jeffrey Rignall was lured into John Wayne Gacy's car, chloroformed and then brutally raped and beaten. When police downplayed the attack, he decided to conduct his own search for his attacker.

Many of John Wayne Gacy's victims, like John Szyc and Gregory Godzik, were dismissed as runaways.

As investigators were searching for missing teen Robert Piest in 1978, they began trailing John Wayne Gacy. He wasn't shy about interacting with them.

When authorities searched John Wayne Gacy's home in 1978 in connection with the disappearance of 15-year-old Rob Piest, they came across shackles, a high school class ring and a pair of driver's licenses that didn't belong to Gacy.

"John Wayne Gacy: Devil in Disguise" premieres on Peacock Thursday, March 25.