Federally, the law is very clear on legal correspondence. In the Federal Bureau of Prisons, outgoing mail can be sealed and mailed via legal mail call every weekday morning. Correctional staff are not permitted to read these outgoing letters.
American prisons foster a culture of violence, hatred, bigotry and dominance. They take the criminally inclined, and not so inclined, and turn them into hardened convicts who, after a period of years, become dangerous men.
I'm not talking about a little tweak here and there. I'm talking about throwing a massive metaphorical hand grenade into the entire system and starting over from scratch. We should be ashamed of ourselves for allowing the system to have morphed into what it has.