What US state became headline news when Police Chief Joseph Kozenczak investigated John Wayne Gacy's serial killing spree.  
Joseph R. Kozenczak: Joseph R. Kozenczak was the former Chief of Police of Des Plaines, Illinois where he worked for 27 years. John Wayne Gacy:  He sexually assaulted, tortured and murdered at least 33 teenaged boys and young men between 1972 and 1978 in Cook County, Illinois (a part of metropolitan Chicago).
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