Oh, like the bus from Limbus Company.

Seems like an issue of ICE agents just walking off unmonitored. Not as simple as jailing them all as a lot of them are random unregistered guys given suits and guns. After that, the question of enforcability. Thus it boils down to "we'll probably need a task force dedicated to finding these guys."

Given how many ICE agents there are, and their presumable continued presence, it'd be absurd to assume they wouldn't. That's just what happens when militias splits up.

It's like purposing guard rails, they're not doom casting that someone'll fall, they prevent falls that would happen without them.