John Wayne Gacy aka the "Killer Clown" and "Pogo the Clown" was a Des Plaines, Illinois serial killer convicted of 33 murders and who was executed by the state of Illinois via lethal injection on May 10, 1994. 
 
8" x 10" photo of Gacy dressed as Patches the Clown. 
This photo is from the early to mid 1990's.