John Wayne Gacy murdered 33 boys and young men during the 1970s
He was convicted in 1980 and executed by lethal injection in 1994
A new docuseries probes whether Gacy could have murdered 12 more people
A previously unseen interview sees Gacy raising the possibility of accomplices The dead won t bother you. It s the living you ve got to worry about, he says
A source on the case says that Gacy was out of town for some of the murders
Gacy s attorney Karen Conti said he was the worst of the worst
Conti said he was fascinating because he was a pleasant man, yet utterly evil