I don't know what they did, yet, actually. But you're right, when it became clear they were going down, Rahm made sure they got stuck in the same prison. Zeke lent a hand, in his own understated way. It's important one Emanuel keep the fuck out of this, at least as far as the world knows. Gotta keep big brother above suspicion.

Rahm doesn't give a fuck about drugs. Whatever these bitches wanna do to their bodies, it doesn't matter. Hell, he's been a hookup for some blow once and a while, when he needed a guy in his pocket. But drugs make you fucking stupid, and Rahm's not sticking his goddamn neck out for some skinnyass baby fish if he's just gonna roll over-- or roll over on Rahm-- for some coke and a suckjob. Drugs make you stupid, and stupid people aren't loyal. Rahm hates stupid, and he needs loyal. So Barry's gonna keep detoxing until the only shit he needs is Rahm. Simple as that.