John Wayne Gacy aka "The Killer Clown" and "Pogo the Clown" who was convicted of murdering 33 young men and boys and burying 29 of them beneath his home and in his crawlspace in Des Plaines, Illinois. Gacy executed via lethal injection by the state of Illinois on May 10, 1994.
 
Birthday card from Gacy to a member of his legal team which Gacy has hand signed using a variant of his signature he would use when writing to children. 
Hand signed, Best Wishes, John Gacy.
 
Includes original mailing envelope on which Gacy has written his legal team members first and last name.