The Reservoir Dogs star's official cause of death was an enlarged heart, which weighed over 1.54 pounds, and would have been exacerbated by the cocktail of drugs in his system.
Besides marijuana and morphine, Chris Penn's system also contained Valium, codeine and an antihistamine. The 40-year-old brother of Sean Penn, weighed over 280 pounds at the time of his death and had a history of drug abuse.
He was found dead in his Santa Monica, California, apartment on Jan. 24.
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