This lawsuit is possibly even more damning than Minnesota's.
Illinois AG Kwame Raoul laid out what ICE/CBP are technically allowed to do when operating in the interior of the country.
Largely ICE needs a warrant or very clear probable cause to detain or question a person. They typically need to know long in advance who it is they are their to detain.
Instead of that very individualized enformecent ICE is doing cartoon evil shit, like patroling on a gunboat for papers.