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. 

Birthday card to a memeber of Gacy's legal team. Gacy has written a message and hand signed, John W. Gacy.
The writing on the front of the envelope is the recipient's first name which has been handwritten by Gacy.

John Wayne Gacy Signed Birthday Card With Envelope