Robin Williams was found dead yesterday in his house in Tiburon, California of a suspected suicide. Details are sketchy, but according to a sheriff's statement, a 911 call came in at 11:55am describing a man "not breathing inside his residence." The sheriff's office and two fire departments were dispatched to the house north of San Francisco where Williams, 63, lived with his wife. Williams was "pronounced deceased" at 12:02pm, and investigators suspect "the death to be a suicide due to asphyxia." The actor's publicist said in a statement that Williams had been suffering from acute depression. He'd also been open about his past substance-abuse battles, and recently admitted himself into a preventative treatment facility to confirm what his rep called his "continued commitment" to staying clean.