I know a few people in my family who have been in prison - two male cousins. Neither were 'bad lads' so to speak, just fell in with the wrong crowd and made some dodgy decisions
One was in for shoplifting , and another time handling stolen goods (hiding for his friend, repeatedly). Stupid yes, but not violent in any way. I loved him, he was so nice and almost like a big brother to me, he died before 30 of alcoholicism
Another was heavily into drugs. Silly sod stole his stepdads car and drove it down a mountain (as in passed out at wheel, lost control and turned it down the side of a mountain,) and crashed. Very dangerous, could have killed someone. However, again just a silly young man with no real malice to him
Prison did them both no good. My first cousin came out, continued working on the roads, continued drinking, continued mixing with the same people and nothing changed. As mentioned earlier he died increadibly young.
My other cousin, we don't really mix with. When he left prison the first time he came to us and mam gave him a cooked dinner and some toiletries, there wasn't much love there though and I think she did that only because she felt sorry for him. I saw him again years later in the bus, he'd just left prison again, had been drinking heavily and was going to rehab. Not sure how he got on, that was a few years ago.
The difference in the two was their attitudes. First cousin, while his friends etc remained the same, never returned to prison again after 2nd time. He did try and clean up his act on numerous occasions. He was never violent, was never a tighter, and not a thief. He'd ask for loans off family but if told no he would accept it. He really tried. He also made time for family - gave lifts, picked me up from school, mowed the lawn etc.
The second cousin, hmm. He didn't see his son for reasons unknown, he was heavily into drugs and would steal whatever wasn't nailed down, he too would ask for loans but would get aggressive when told no. He dealt drugs and brought police to uncles door many times. He wasn't really sorry for his actions. Never bothered with the family unless he wanted something, usually money or food.
Both cousins hates each other. Cousin 1 was my uncles son by his first wife, cousin 2 was his stepson by his 2nd wife