On November 26, 2003, the day before Thanksgiving, his wife of nearly 43 years, Mary Lou, died of pneumonia. Stewart, who had been scheduled to play Billy Bob's three days later, canceled his concert appearances. His friends later told reporters that he was extremely despondent after Mary Lou's death. On December 16, his daughter's boyfriend and Stewart's very close friend, Bill Hardman, visited his Fort Pierce, Florida, home to check on his welfare. They found Stewart dead of a self-inflicted gunshot wound to the neck.