Cameras rolling, Border Patrol chief Gregory Bovino sailed down the Chicago River in a convoy of government boats. His men held rifles as videographers filmed the stunt later posted to their social media.

The Border Patrol leader who's behind an aggressive immigration crackdown across the Chicago area is applauding his agents' use of force and aggressive tactics.

In the complaint filed Thursday, the ACLU details the May 21 traffic stop of a Latino couple on Fort Fairfield Road in Aroostook County.

Immigration officials say that Bovino, who was not wearing a helmet, was struck in the head by a rock. One protester who filmed the encounter disputes that he was hit.