William George "Bill" Bonin aka "The Freeway Killer" was an American serial killer executed by the state of California on February 23, 1996. 

2 1/4" x 8 1/2" cut letter signature hand signed, Your Loving Friend and Brother in Christ, Bill.
Includes the original top portion of thel San Quentin State Prison stamped mailing envelope with 5 lines of address typed by Bonin and postmarked San Quentin, CA November 6, 1995.