The shadows easily hold Lee captive; there’s enough give that their grip isn’t painful, but their strength is steely and far beyond Michael’s. He doesn’t notice. He doesn’t know what he’s doing right now.
He should have expected this reaction from Lee, he shouldn’t have said anything about the District or Kevin or anything else, but he can barely control his mouth even when he’s on his best behavior. “We’re not going anywhere! Are you nuts?! You’re sick, they put something in you, we don’t even know what! What if they’re still out there looking for you?”
Anyone could kill Lee right now. He’s pretty sure they can’t use magic for some reason, they’d have escaped that place right away otherwise. Maybe they feel too ill to concentrate. Those cops got lucky.