supreme court ruling named after the oldest and longest serving member of this group, 72-year-old henry montgomery. >> you were 17 years old when you were sentenced. do you remember what it was like being 17? >> yeah. young, wild, stupid. >> montgomery was indicted for murder in november 1963, the same month jfk was assassinated. he's been at angola for 55 years. >> man, i'm behind 55 years, and technology i'm 150 years behind the times. >> in 2012, the united states supreme court ruled that mandatory life without parole sentences for juveniles are unconstitutional. pointing to science that it's clear that adolescent brains are not yet fully mature. that ruling didn't apply to montgomery who had already been sent away as a juvenile. that's why he took his case to the supreme court and in 2016 he won. now all juvenile lifers, no matter how long ago they were locked up can make a case that they deserve parol. >> mostly older guys here. >> this 78-year-old is one of them. i went to see him in the dorm where he lives. >> this is my bed right here. >> this is your home? >> yeah. this is mine out here.