The case of Rodney Alcala will be featured on ABC's 20/20 on Friday, January 8, which involed him appearing on a dating show in the middle of a killing spree.
At the time, the show's contestant coordinator Ellen Metzger (who is now Mike's wife) pushed for Alcala to appear on the episode because she thought he was "so attractive and women are going to love him" and liked that his interests were skydiving and photography.
"I don't know, he was just very striking," Ellen Metzger says in a clip obtained by the Daily Mail. "There was a boldness about him. He had long black hair - he was just a striking looking person."
Alcala has since been convicted of killing seven women in the 1970s, five of which happened in California. His youngest victim was a 12-year-old girl that he abducted while she was on her way to ballet practice in Los Angeles.
Authorities have linked him to the killing of over 130 women and children, though the exact number of victims remains unknown.
Watch a clip from the show below, and read more here.