The Chicago Rippers (also known as the "Ripper Crew") was a four-man organized crime and satanic cult group led by Robin Gecht, which terrorized Chicago and its surrounding suburbs in 1981 and 1982. Robin Gecht: The ringleader and a former construction subcontractor who once worked for serial killer John Wayne Gacy.Edward Spreitzer: An associate of Gecht.Andrew Kokoraleis: An associate and the brother of Thomas.Thomas Kokoraleis: An associate and the brother of Andrew.