Stanford doctor talks about disease Robin Williams suffered from

Comedian and actor Robin Williams' life left an indelible mark on many, but his sudden death by suicide in August of last year also left many questions.

His widow, Susan Schneider Williams says her husband's suicide left her wondering what really killed him. This week she revealed his autopsy held the answer.

Williams announced her husband had Lewy body dementia, which is a progressive brain disease.

She said during the last two years of his life, Williams dealt with anxiety, depression, delusions and loss of movement.

He was even diagnosed with the early stages of Parkinson's disease, often confused with Lewy body dementia.

Susan says robin was supposed to go to an inpatient facility for treatment. About a week after the decision was made, he committed suicide

He died on August 11th, 2014.

On Thursday’s edition of the Four By Four, Mike Mibach and Keba Arnold spoke with Doctor Kathleen Poston with the Stanford University Medical Center about Lewy body dementia, an affliction that affects some 1.3 million Americans.