Kenneth Douglas, from Hamilton, admitted to having sex with up to 100 dead women, while high on drugs and alcohol, over the period between 1976 and 1992, while he worked in the night shift, the New York Daily News reported Sunday.
"I would just get on top of them and pull my pants down," Douglas was quoted as telling a court.
Douglas said, in a court deposition, he would attack the dead women when he was high on drink or drugs.
"If I hadn't had anything to drink when I went to work, it wouldn't happen," WPTV quoted Douglas as saying.
His wife complained that he "reeked of sex" when she picked him up from his workplace.
His victims included Charlene Appling, 23, with whom he had sex with on the day she died after being strangled. She was six months pregnant.
Another victim was Karen Range, 19. Douglas was caught when DNA from his semen was found inside Range's body.
Douglas's crimes came to light when the killer of Range, David Steffen, appealed his conviction for rape and murder.