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Mark S. Thornton California

Mark S. Thornton
Mark S. Thornton is an inmate on death row in the state of California..

Crime

Thornton, then 19, abducted a woman, Kellie Colleen O’Sullivan from a parking lot, killing her and stealing her car, which he then used to abduct his 16-year-old former girlfriend. She escaped at a casino in Nevada.\

In September 26, 1993, searchers located the decomposed body of Kellie Colleen O’Sullivan, concealed by heavy brush, alongside a remote section of Mulholland Drive in Los Angeles County. She and her vehicle had vanished on September 14, 1993. She had been shot three times in the chest. Defendant was arrested in Reno, Nevada, and charged with O’Sullivan’s murder and other crimes. Throughout the guilt phase proceedings defendant denied that he committed the first degree premeditated and deliberate murder of O’Sullivan and that the felony-murder special circumstances were true. He also maintained he did not kidnap Stephanie C., a minor. But in closing argument, without conceding the truth of the felony-murder special circumstances, he conceded he was guilty of murdering O’Sullivan under a theory of first degree felony murder. 

Address

Mark S. Thornton J63600
San Quentin State Prison Death Row
San Quentin, CA 94974



Links of Interest


Videos of Interest


Notes

If you have had experience with this inmate, we'd love to provide your experience, negative or positive. This can be done anonymously or not.If you are related to the victim, we would also include anything you have to offer. 

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