Harvey Louis Carignan aka "The Want Ad Killer" and "Harv The Hammer" was sentenced to death while serving in the army for a 1949 rape and murder while stationed at Fort Richardson in Anchorage, Alaska. before having his sentence reduced after his lawyers appealed that his confession had been unlawfully elicited. Upon his release from prison in 1960 and continued his killing spree before he was arrested for the last time in September 1974. 

Two page typed letter signed, Harvey :-), with a hand drawn smiley face.
Includes the original prison issued mailing envelope hand signed, Harvey Carignan.

Harvey Carignan Signed Letter and Envelope Set