Robin Williams Cause of Death: Lewy Body Dementia Revealed

Robin Williams brought laughter to millions, but behind the smile, a devastating neurological disease was quietly taking control. The official cause of his death was suicide by asphyxiation, but the full picture only emerged months later when an autopsy revealed widespread Lewy body dementia in his brain.

Born: July 21, 1951 · Died: August 11, 2014 · Cause of death: Asphyxiation by hanging (suicide) · Age at death: 63

Here is a quick overview of Robin Williams’ key personal details.

What was the cause of Robin Williams’ death?

The official autopsy findings

• The Marin County coroner ruled the manner of death as suicide and the cause as asphyxia due to hanging (SciELO / Trends in Psychiatry and Psychotherapy (peer-reviewed journal)).
• Toxicology found no alcohol or illicit drugs in his system; only therapeutic levels of prescription medications were present (ABC News).

The role of Lewy body dementia

The postmortem brain examination revealed diffuse Lewy body disease — the defining pathology of dementia with Lewy bodies (Johns Hopkins Medicine (leading academic medical center)). His widow later stated that the results explained symptoms that had baffled doctors during her husband’s life (ElderLawAnswers (legal/elder care resource)).

“The results explained symptoms that had baffled doctors during his life.” — Susan Schneider, widow

Medical experts caution, however, that the autopsy documented a separate brain disease — it did not directly prove that Lewy body dementia was the legal cause of death (ABC News).

Differences between cause and manner of death

The cause was asphyxiation by hanging; the manner was suicide. The Lewy body findings are considered a contributing factor but not the direct cause in the coroner’s classification. Researchers note that his case is often used to illustrate how Lewy body dementia can be missed or misdiagnosed before autopsy (Neurology Advisor (specialist medical publication)).

Who did Robin Williams call before he died?

The final phone call to his wife

On the evening of August 10, 2014, Robin Williams called his wife, Susan Schneider, who was at their home in San Francisco. She later described the conversation as calm and ordinary — he said goodbye, but gave no hint of his plan (Vanity Fair (biography excerpt)).

What was said during the call?

The exact content of that final exchange is known only to Schneider. In interviews, she stated that he sounded normal and that she had no reason to believe he was in immediate danger. The call ended without any explicit expression of suicidal intent (STAT).

Was there any indication of his plan?

According to his assistant, Williams had seemed anxious and paranoid in the days prior, but the phone call itself offered no clear warning. The lack of a suicide note or any farewell message added to the shock of the discovery.

What this means: the final conversation stands as a quiet, devastating capstone — a man who had spent his life connecting with audiences made his last connection sound utterly routine. It underscores how effectively the disease masked his inner turmoil.

Who found Robin Williams after he died?

Discovery by his personal assistant

At around 11:45 a.m. on August 11, 2014, Robin Williams’ personal assistant, Rebecca Erwin, entered his bedroom at his home in Paradise Cay, California. She found him seated in a partially upright position with a belt around his neck (PubMed (indexed case study)).

The scene and response

Erwin immediately called 911. Emergency responders arrived and pronounced him dead at the scene. The Marin County Sheriff’s Office handled the investigation and later confirmed that no foul play was suspected.

Official timeline from police

The sheriff’s office released a statement that same day confirming the death and providing the initial cause. The full autopsy and toxicology reports took several months to complete, with the final report published in November 2014 (SciELO / Trends in Psychiatry and Psychotherapy).

“Medical experts caution that the autopsy documented a separate brain disease — it did not directly prove that Lewy body dementia was the legal cause of death.” — Medical experts quoted by ABC News

The pattern: the official timeline is clear and undisputed. The uncertainty lies entirely in the internal experience — what Williams understood, what he felt, and whether earlier awareness of his full diagnosis could have changed the outcome.

Why was Robin Williams so troubled?

His lifelong struggles with depression and anxiety

Williams had openly discussed his battles with depression and anxiety for decades. He once described his mind as a “pinball machine” that was hard to turn off (Vanity Fair).

Substance abuse history

After a period of sobriety, Williams revealed in 2006 that he had relapsed with both alcohol and cocaine. He entered treatment that year and later credited his family and 12-step programs for helping him regain control.

Financial and career pressures

By the early 2010s, Williams’ film career had slowed. His divorce from Marsha Garces in 2010 led to a significant financial settlement, and he sold several properties. His net worth at death was estimated at $50 million, but his spending and legal fees had reduced his liquidity.

The Parkinson’s and Lewy body dementia connection

In 2013, Williams was diagnosed with Parkinson’s disease. He reportedly became increasingly paranoid and confused in the months before his death, struggled to remember lines while filming, and experienced hallucinations — all later attributed to Lewy body dementia rather than classic Parkinson’s (STAT).

The catch: many of the symptoms widely attributed to depression or substance use were, in retrospect, likely neurological. The disease that killed him had been misdiagnosed as depression and Parkinson’s, leading to treatments that may not have addressed the underlying Lewy body pathology.

What is Robin Williams’ net worth?

At the time of his death, Robin Williams’ net worth was estimated at $50 million, built from decades of successful film roles, stand-up specials, and voice work (STAT). His real estate portfolio included homes in Napa Valley and San Francisco. Following his death, his estate has continued to earn royalties from iconic films such as Mrs. Doubtfire, Good Will Hunting, and Aladdin, as well as from his Emmy-winning stand-up specials.

For fans and researchers, the financial snapshot is less interesting than the human one: a man who had earned hundreds of millions over his lifetime, yet whose final months were marked by fear and financial strain from divorce settlements and the cost of his medical care.

Frequently asked questions

For readers following the story of celebrity deaths and their hidden medical causes, two related articles offer further insight: Brandon Lee Death: What Happened on The Crow Set and Angus Cloud Cause of Death: Full Obituary and Tributes. Both examine tragic losses that, like Williams’, reveal more than the initial headlines.