I play ball with a guy who is a retired prison guard from the Macomb Correctional Facility in New Haven, Michigan. His attitude was, and one he would try to pass on to new guards, don't trust a one of them, don't let them befriend you, and don't do them any favors. They're all out to scam you.....
VERY VERY true!
I had several of them try me. Didn’t work.
Then there was my drug bust. I busted a guy who had several baggies of Marijuana. Got called “Library Vice” after that.
Befriending a prisoner is a good way to get that prisoner killed for being a snitch. Only prisoners can be “stickmen”.