Robin Williams' autopsy showed no alcohol or illegal drugs; death ruled suicide- Coroner!

Sheriff's officials said on Friday that Robin Williams' autopsy found no alcohol or illegal drugs were in his body when he killed himself at his Northern California home in August.

Reports says the autopsy results released by the Marin County sheriff's office found that the actor had taken prescription medications, but in "therapeutic concentrations."

The coroner ruled Williams' death a suicide that resulted from asphyxia due to hanging.

Sheriff's Deputy Stewart Cowan said Friday that his office was not releasing further information from the report, aside that the late Williams was found in the bedroom of his home in Tiburon on the morning of Aug. 11.  which was preliminarily ruled a suicide.

Susan Schneider, Williams' wife,  said the actor and comedian was struggling with depression, anxiety and a recent Parkinson's diagnosis when he was found dead by his personal assistant at his Marin County home.

Robin publicly acknowledged periodic struggles with substance abuse. He had entered a substance abuse rehabilitation program shortly before his death.