 Two years later, on May 11, 1976, Jones' 21-year-old daughter, Marythen a student at Occidental Collegecommitted suicide by jumping from the roof of a 20-floor hotel in downtown Los Angeles.This led to Jones' subsequent interest in mental health issues.In 1979, with husband Simon (whose own son, Robert, committed suicide in 1969), she founded the Jennifer Jones Simon Foundation For Mental Health and Education, which she ran until 2003.