Every weekday, Clark Porter, a tall man with a sturdy build, walks into the Thomas F. Eagleton U.S. Courthouse in St. Louis to work with tough ex-offenders. On the outside, he wears a suit and tie. But on the inside, he has more in common with the former felons than most.
Back in 1986, a skinny 17-year-old Porter went on trial there as an adult for robbing a post office at gunpoint. His sentence: 35 years.