Border Patrol, Chicago
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Heated confrontation erupts as progressive Mayor Daniel Biss challenges Border Patrol commander Gregory Bovino on camera during immigration enforcement operation outside Chicago.
The Chicago Police Department said in a statement that they did not assist federal authorities with immigration enforcement.
An attorney for the union said Border Patrol commander Gregory Bovino and his crew rolled up on a picket line and asked to see identification.
Prosecutors said that Luis Uribe, 44, was an armed CBP and immigration officer and was stationed at O'Hare International Airport at the time.