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

U.S. Customs and Border Patrol Commander Gregory Bovino is expected to testify in Chicago federal court on Tuesday after U.S. District Judge Sara Ellis ordered him into her courtroom following several alleged violations of her temporary restraining order on use of force against people protesting federal immigration enforcement activity.

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.

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

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,

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.