When ICE officers want to chip in and help track down and jail local criminals for local offenses then it would be OK to work in concert with them on federal issues.  An integrated approach.  Currently ICE just wants to camp out outside Denver jails and courts arresting people without warrants that they only found through the efforts of local law enforcement.  They're carrion feeders like jackals and vultures. It costs money to catch and process rule breakers. ICE wants a one-sided deal and the city can't afford that.  Stick to your guns Mr. Hancock.