US guards often push drugs for side money
(Guards who are overworked and underpaid)
(Guards who are overworked and underpaid)
Who brings them in? Possibly guards but visitors can also bring in a lot. Pretrial detention is tougher. The drugs are brought into prison and then smuggled into pretrial detention.
Edit: I'd never seen anything except weed before I went to jail. Inside jail I saw and was offered every single drug known to man in whatever quantity I wanted.