Update (8/12 11:30am) (NBC Bay Area) Robin Williams killed himself by wrapping a belt around his neck and a chair, and also tried cutting his wrist with a pocket knife, according to a preliminary investigation by the Marin County sheriff's department.
Speaking to a bank of reporters on Tuesday, Lt. Keith Boyd said Williams' body was found a day earlier in a "slightly suspended" and "seated position" in his Tiburon home about 11:45 a.m. by his personal assistant.
Williams, 63, was pronounced dead at his home just after noon on Monday, after an unknown caller reported that a man had been found unconscious and not breathing inside his Tiburon home, Lt. Keith Boyd, assistant chief deputy coroner, said in a statement.
The last time the actor was seen alive, Boyd reported, was Sunday night at home with his wife, Susan Schneider, about 10 p.m.
(NBC News) Actor Robin Williams has died, according to the Marin County Sheriff's Office. Sheriff's investigators are investigating his death, believed to have been a suicide.
Statement from Mara Buxbaum, press representative for Robin Williams: "Robin Williams passed away this morning. He has been battling severe depression of late. This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."
Williams' wife, Susan Schneider, issued the following statement: "This morning, I lost my husband and my best friend, while the world lost one of its most beloved artists and beautiful human beings. I am utterly heartbroken. On behalf of Robin's family, we are asking for privacy during our time of profound grief. As he is remembered, it is our hope the focus will not be on Robin's death, but on the countless moments of joy and laughter he gave to millions."
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