He later dropped out from the seminary and earned his bachelor's degree from Boston College in 1968. He went on to attend the Yale School of Drama for a year and a half before leaving to begin his work in professional theatre. Antoon died at the age of 47 from AIDS-related lymphoma on January 22, 1992, at the NYU Medical Center.
He left seminary to pursue his education and then entered the world of professional theatre. He later passed away from AIDS-related lymphoma at the age of 47 at NYU Medical Center.