Ottis Toole was the sidekick of Henry Lee Lucas, a convicted killer and self procliamed serial killer who is believed to have murdered Adam Walsh who disappeared from a Hollywood, Florida shopping center in 1981.

Original prison stamped envelope postmarked December 20, 1989 completely penned by Ottis and hand signed, Ottis Toole. 
Includes a drawing on the back which appears to be far too detailed to have been drawn by Toole and was likely done by another inmate.

Ottis Toole Signed Envelope With Unknown Artwork