Story? Yes, a cautionary tale: Commit armed robbery, and you very well could end up dead. Deservedly dead. If it dissuades even one yoot from taking up a life of violent crime, if it guides even one misguided ghetto rat toward becoming something other than a ghetto rat ... it will be worth it.
Accomplishments? What? Getting up in the morning? Breathing? Eating? Getting his sorry carcass removed from the gene pool?
If it deters no one else it was worth it. It deters him from doing it again. He has learned his lesson.