According to the Marin County Sheriff's Office, Robin Williams' death Monday was due to asphyxia caused by the late actor hanging himself with a belt.
Sheriff's officials held a news conference Tuesday, in which they shared shocking details of Williams’ tragic passing.
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"At approximately 10:30 a.m. on August 11, 2014, Mr. Williams' wife left the home, believing Mr. Williams to still be asleep. Mr. Williams' personal assistant became concerned at around 11:45 a.m. when he failed to respond to knocks on his bedroom door," Lieutenant Keith Boyd told reporters. "At the time, the personal assistant was able to gain access to Williams' bedroom and entered the bedroom to find Mr. Williams clothed, in a seated positon, unresponsive, with a belt secured around his neck with the other end of the belt wedged between the closed closet door and the door frame."
Boyd shared that they received the 9-1-1 call at approximately 11:55 a.m. on Monday, August 11. Williams, 63, was then pronounced dead at 12:02 p.m.
The caller was "distraught" and indicated at the time that an apparent suicide had taken place and that rigor mortis had already set in.
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In addition, cuts were found on the inside of Williams' left wrist.
"The inside of Mr. Williams' left wrist had several acute superficial transverse cuts," he said. "A pocket knife with a closed blade was located in close proximity to Mr. Williams."
According to Williams' rep, the actor had been battling "severe depression as of late."
Toxicology reports will also be conducted to determine if Williams had any chemical substances in his system at the time of his death, but will not be available for approximately two to six weeks.