Bovino, a nearly 30-year veteran of the U.S. Border Patrol, has emerged as a central figure in Trump's aggressive immigration strategy.

Immigration agents deployed chemical agents in Chicago neighborhoods over the weekend as attorneys argue the actions violate a temporary restraining order against such tactics.

Attorneys said what happened in one incident in Little Village and another in Old Irving Park shows a pattern of force by federal agents that goes beyond what a court allowed during an enforcement operation.

The top U.S. Border Patrol commander spent an hour on the stand Tuesday, responding to U.S. District Judge Sara Ellis' concerns about how federal agents have handled themselves, people they’ve detained,

US Customs and Border Patrol Chief Gregory Bovino will appear in court Tuesday to answer a judge’s concerns about federal agents’ aggressive tactics after he was recorded throwing what appears to be a tear gas canister into a crowd.

U.S. District Judge Sara L. Ellis called Border Patrol Cmdr. Gregory Bovino into court to respond to reports that his agents violated her orders.

The actions would violate a federal order imposed by U.S. District Court Judge Sara L. Ellis to limit the use of nonlethal weapons and other crowd control tactics.