Serial killer Robin Gecht worked for John Wayne Gacy.
Robin Gecht and three other men, teenage brothers Andrew and Thomas Kokoraleis and Edward Spreitzer, 21, formed a satanic cult and gang called The Chicago Rippers that is suspected in the 1981 and 1982 disappearances of as many as 18 women. One victim, a teenage prostitute they had left for dead, was able to give a description of her attackers, which led to their arrest. Once in custody all but Gecht confessed to the murders and to having removed one breast from each sacrificial victim, having taken turns raping the open wound, having masturbated onto the breast, chopped it up and eaten it while Gecht read verses from The Satanic Bible.
While being interviewed by police, authorities learned that Gecht had done construction work for John Wayne Gacy on at least two separate occasions.