89 years (1897–1986) Click to see full answer Simply so, when did Mae Capone die? April 16, 1986 Additionally, what happened Mae Capone? 25, 1947. The cause was bronchial pneumonia. His death made front pages around the world, but the funeral was a modest affair, Bair writes, because the Outfit allowed only a few of Capone’s old friends to attend. Mae clung to the Palm Island house until 1952, when reduced circumstances forced her to sell it. Hereof, what did Al Capone die of? Cardiac arrest Did Al Capone lose his mind?Not so for Al Capone whose unchecked syphilis destroyed his brain while he was an inmate there, confined to Cell No. 181. Neurosyphilis has many manifestations along the central and peripheral nervous system but Capone’s case was notable for making him certifiably insane.