Lawrence Bittaker serial killer dubbed the "Toolbox Killer" and "Pliers."
 
Bittaker was sentenced to death in March 1981 while his accomplice Roy Norris received 45 years to life. Bittaker passed away on December 13, 2019.
 
4" x 13" upper portion of an original mailing envelope postmarked from the San Quentin zip code,  April 14, 2016.

Bittaker has written his complete return address and hand signed, L Bittaker.