In this archive footage, Gacy jovially demonstrates to a naïve TV reporter "how to tie knots" - giving a glimpse of how he captured victims.

'Killer Clown' John Wayne Gacy revealed why he invented Pogo and how he found wearing clown-face makeup relaxing

"Do you promise to tell the tooth, the whole tooth and nothing but the tooth?" Richard Ramirez's mouth did.

One loved rape and worshipped Satan, the other was a God fearing spinster. This is the story of Richard Ramirez and Doreen Lioy.