('Dead Man Walking' inspiration Prejean shares mission) Personally witnessing the execution of her pen pal, a Louisiana death row inmate, lit a fire in Helen Prejean -- a fire she wanted to spark in others Sunday during her commencement speech to Edgewood College graduates at the Alliant Energy Center. "I want to talk to you about catching on fire. I want to talk to you about passion -- that you might lead a life of passion," Prejean told the class of 2008. When she began writing to Patrick Sonnier, who was executed in 1984 for the murders of two teenagers,...