In a special investigation, The ENQUIRER reveals ROBIN WLLIAMS’ longtime confidante and pal REBECCA ERWIN SPENCER discovered his dead body. 

Marin County Sheriffs confirmed that Robin WIlliams’ personal assistant had discovered his gruesome death scene on Monday afternoon.

 Now, a joint investigation by The National ENQUIRER and RadarOnline can reveal that the individual who made the shocking find was William’s longtime confidante and friend, Rebecca Erwin Spencer.

Spencer, 57, was spotted at Williams’ Tiburon. Calif, home around 11 a.m. on Tuesday morning. “She went into the house for a few minutes before someone in the house let her out of the garage and she left quickly,” an eyewitness tells Radar.

A “distraught” Spencer called 9-1-1 at roughly 11:55 a.m. August 11,, and police arrived soon after to pronounce Williams dead.

 After Williams was unresponsive to knocks on his bedroom door, Spencer, “was able to gain access to Mr. Williams’ bedroom and entered the bedroom to find Mr. Williams clothed in a seated position, unresponsive, with a belt secured around his neck with the other end of the belt wedged between the closed door and the door frame,” Marin County Lieutenant Keith Boyd said. He also had several “superficial cuts” on his left wrist and a bloody knife was found near his body.

“Mr. Williams at that time was cool to the touch, with rigor mortis present in all of his extremities, and livor mortis positioned appropriately for the position he was located in,” Boyd continued.

Rebecca Spencer returned to her own home nearby around 4:30 p.m. on Tuesday, and neighbors said she had been in and out of the property since Williams’ death. A Prius registered to her was seen multiple times at Williams’ home.

Though Spencer and her husband, Dan, are a private couple, according to neighbors, friends had gathered at her home in support on Tuesday, and others had left condolence notes and bouquets of flowers outside on her porch.

Sadly, just a few days before, Williams had been seen battling his demons at an Alcoholics Anonymous meeting in San Francisco.

 “He was at a meeting on Saturday,” AA member Argus Hamilton, 58, told the U.K.’s Sun. “He had got out of rehab and was sober at the meeting.”

As The ENQUIRER has reported, Williams was a presence at local AA meetings even earlier this year, before deciding to enter rehab at The Lodge at Hazelden in Minnesota this summer. Reps said at the time that he was looking to “fine-tune” his commitment to sobriety, amid what insiders told The ENQUIRER were “serious money issues.”

Lt. Boyd said in Tuesday’s press conference that toxicology reports are expected back in five to six weeks.

If anyone you know is struggling with thoughts of suicide, please immediately seek help. You can speak with a skilled, trained counselor at a national Suicide Prevention Lifeline crisis center in your area, anytime 24/7 — call 1-800-273-TALK (8255).