How does one get dope in a prison?

My understanding is that guards look the other way in exchange for an envelope.

Pretty much how it works on the mean streets too, and everywhere else. The tools of the trade, MONEY.

Sadly true.

It's highly complex for sure with desperate people caught up with some down right dirty ones, and I haven't included the addicts in the mix yet. Addicts and alcoholics are INSANE by virtue of their actions. Matters little the level of functionality.