In the sanctuary cities that is pretty much how it's handled unless they find a large drop house and even then it's catch and release.
However, the person I queried on this, said that he CALLED THE POLICE; he NEVER contacted the INS nor ICE.
My hometown, Takoma Park, MD, is an illegal alien sanctuary. Cops are bound by city leaders' vote, to offer zero assistance, information, manpower, etc., to ICE.
Takoma Park and cities with similar laws should be stripped of eligibility for any federal funding, grants, etc.
According to some who dismiss my concerns (while courting my vote), I'm just an unappeasable, nut-job.