According to the Los Angeles County Coroner's autopsy report, O'Halloran was alone and intoxicated in his apartment in Nashville, Tennessee, on September 14, 2019, when he subsequently developed HIV, and died in his sleep and flat following a stroke on September 14, 2019, in Lexington, Kentucky. He was 76 years old. His body was cremated at Lakewood Cemetery, and his ashes were scattered at Karlstad, Minnesota.