MARIN COUNTY, California -- Robin Williams apparently died of asphyxia due to hanging, Marin County Sheriff's Lt. Keith Boyd said Tuesday. The final cause will not be certified for several weeks, said Boyd, who also is the county's Assistant Chief Deputy Coroner
Williams' body was found "slightly suspended in a seated position" with a belt around his neck, Boyd said. The other end of the belt was between a closed door and the door frame.
Williams' left wrist had cuts when he was found dead in a bedroom at his home, Boyd said. A pocket knife was found near his body, and a red material consistent with dried blood was found on the knife, Boyd said. He said tests will be conducted to determine whether the substance is blood.
Williams was last seen alive at about 10:30 p.m. Sunday, by his wife, when she went to bed, Boyd said.
He apparently went into a bedroom at an unknown time after that, and his wife left the home at about 10:30 a.m. Monday, believing him to be asleep, Boyd said.
Williams' personal assistant, concerned because he wasn't responding to knocks on his bedroom door, entered the room and found him dead at about 11:45 a.m., said Boyd.
This is a developing story.