One of several examples the U.S. Department of Justice gave of how federal officials have been obstructed by Illinois’ migrant sanctuary policies involves an illegal alien released from jail later being accused of murder.
“In January 2025, federal officials issued a detainer request for an alien who was being held in Cook County jail on sexual assault of a minor charges,” the DOJ said. “Pursuant to Cook County’s restrictions, law enforcement officers did not respond to the detainer request … Following the alien’s release from local jail, he was arrested and charged with homicide just 17 days later.”
The filing in federal court comes as the state of Illinois, Cook County and the city of Chicago are asking the judge in the case to hold off on tackling migrant sanctuary policies that the DOJ says obstructs federal agents from doing their job.
In a statement of material facts for its motion for summary judgment against the state’s migrant sanctuary laws, the U.S. Department of Justice last week said the federal government has exclusive authority over immigration laws and enforcement and President Donald Trump issued an executive order declaring a national emergency at the border.
“Congress recently expanded the list of crimes that can trigger mandatory detention requirements to include burglary, theft, larceny, shoplifting, or assault of a law enforcement officer, or any crime that results in death or serious bodily injury to another person,” the DOJ said in its filing for summary judgment. “Defendants’ sanctuary policies cause significant harm to federal immigration enforcement and public safety by not honoring immigration detention orders, or helping facilitate access to detainees in local custody.”