Herbert William Mullin was an early 1970's Santa Cruz, California serial killer born on April 18, 1947. 
Mullin was serving life in prison for 13 murders which he says he committed to prevent natural disasters.  Mullin died of natural causes on August 18, 2022.
 
7 1/2" x 8 1/2"  drawing with Mullin's handwriting on both sides.