Denver officials on Thursday said they would not hand over information requested by U.S. Customs and Immigration Enforcement on four men wanted for deportation. ICE, the Homeland Security agency tasked with arresting and deporting people in the U.S. illegally, sent four administrative subpoenas earlier this week to law enforcement looking for information on three Mexican nationals and one Honduran who had been in custody in Denver. It was the first time subpoenas had been sent to a law enforcement agency — an escalation of the conflict between the Trump administration and so-called sanctuary cities.