A new study reveals what true crime story interests Illinoisans the most. EdwardsKirby.com used Google search data and 63 true crime cases to conduct their research. In Illinois, John Wayne Gacy is searched more than anyone when it comes to horrific crimes. Gacy murdered at least 33 men and boys and was executed in 1994. In Indiana, the murder of Sylvia Likens came out on top. in Wisconsin, murderer Ed Gein is searched the most, and in Missouri, it is Ken McElroy.