John Wayne Gacy aka the "Killer Clown" and "Pogo the Clown" was a Des Plaines, Illinois serial killer convicted of 33 murders executed by the state of Illinois via lethal injection on May 10, 1994. 
 
P.D.M. Contractors unused company check #3596 with stub.
The check includes Gacy's phone number and address 8213 W. Summerdale Ave, Norwood Park Township, Illinois.