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 checks #3490 and #3491 and includes their stubs. 
The checks include Gacy's phone number and address 8213 W. Summerdale Ave, Norwood Park Township, Illinois.

John Wayne Gacy Two PDM Contractors Checks With Stubs