Susan Carson

Susan & James Carson (1981-1983) were 30-year old hippies from 
San Francisco who operated a large pot farm in Humbolt County, 
California. They regularly took hallucinogenic drugs, and during 
one of their trips, Susan had a vision to change their names 
(to Suzan & Michael Bear) and declare allegiance to the Muslim 
faith. They became convinced some of their old friends and 
acquaintances as well as regular visitors to the pot farm were 
witches bent on doing the world evil, so they killed 3 people by 
smashing their skulls, stabbing, and shooting. No evidence of 
sexual motive or profit was present, and at their trial, they 
claimed self-defense in ending spells put on them and in doing 
the world a favor by ridding it of evil. They were sentenced to 
25 years to life.

http://faculty.ncwc.edu/toconnor/401/401lect11.htm