First of all, he is not a kid. He is 26 - he should act like a grown up. There are many that had bad lives when they were growing up (Michal Jordan) comes to mind, but he didn't go out and rob in desperation.
There are many supporting families on less a year than his bond - they don't go out robbing. So stop excusing him. He screwed up big time and he will have to pay for it. He could have lost his life if someone would have had a gun and decided to shoot him. He didn't so be glad of it. And as for your sister,, she may be glad he is not in her life now. What if he had involved her and she got hurt. You would be screaming for justice.
More information about formatting options