John Wayne Gacy aka "Pogo the Clown" and "The Killer Clown" who was executed via lethal injection by the State of Illinois on May 10, 1994.

Raymond Kasper aka "Ed Kasper", who is currently serving a prison sentence for sexual assault on a 12 year old. 
Three page typed letter hand signed, Ed Kasper. This letter has some rather interesting content and is addressed to a former writer and editor for Playboy magazine.
Includes the original mailing envelope postmarked October 5, 1993.