Authorities say an autopsy on actor Robin Williams found no alcohol or illegal drugs in his system when he committed suicide at his Northern California home in August.
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The Marin County sheriff's office released the autopsy results Friday. It found Williams had taken prescription medications, but in "therapeutic concentrations."
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The coroner ruled his death a suicide that resulted from asphyxia due to hanging.
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Sheriff's officials have said Williams was found in the bedroom of his home on the morning of Aug. 11.  (AP)
