Brothers Jim and Artie Mitchell, founders of San Francisco's notorious O'Farrell [porn] Theater were legends; well, they were infamous anyway. The Mitchells were pioneers of modern pornography, producing Behind the Green Door with Marilyn Chambers in 1972. They spent $60,000 to make the movie and it grosed $25,000,000. The Mitchell Brothers partied with rock stars and hung out with Hunter S. Thompson. Then, in 1991, Jim shot Artie and killed him, and Jim would not be the last generation of Mitchell to murder...

Sources:
https://www.mercurynews.com/2007/07/15/porn-king-jim-mitchell-dead-at-63/
http://sfappeal.com/2011/08/heir-to-sf-porn-empire-blames-family-name-for-murder-conviction-35-year-sentence/
https://www.marinij.com/2009/07/13/james-mitchell-jr-had-a-tragic-childhood/
https://en.wikipedia.org/wiki/Mitchell_brothers#Personal_lives