The younger brother of Oscar-winner Sean Penn was found dead at his Santa Monica, California, condominium on Tuesday.
Morticians carried out an autopsy yesterday and found no signs of foul play, although they are yet to determine the exact cause of death.
Spokesperson Lieutenant Cheryl MacWillie says, "It appears to be a natural death."
Examiners are believed to have linked Penn's weight to his baffling death—he weighed more than 270 pounds.
Santa Monica Police Department spokesman Lieutenant Frank Fabrega has confirmed there will be no homicide investigation.
Ryder Pays Tribute to Penn
Speaking at a screening of Darwin Awards at the Sundance Film Festival last night, Ryder said, "I really hope people go back and watch his movies. He was such a fantastic actor. He's not just Sean's little brother. He was Chris Penn."
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