For decades, Sister Helen Prejean has been a prominent opponent of the death penalty. She started her prison ministry in the 1980s, serving as a spiritual advisor to those on death row. She chronicled her experiences in the 1993 book, "Dead Man Walking." It was adapted into an Oscar-winning movie, a play and an opera. The Atlanta Opera performs "Dead Man Walking" starting Feb. 2. It tells the story of Prejean and her relationship with death row inmate Joseph De Rocher. Prejean stopped by "On