Police in a Chicago suburb are collecting videos and other evidence to send to the Illinois attorney general’s office after a car crash involving a U.S. Border Patrol vehicle led to a violent arrest caught on video showing an agent repeatedly punching a man in the head while pinned to the ground.

Immigration agents arrested three people after a sedan collided with the rear of the U.S. Border Patrol vehicle around noon Friday in the city of Evanston. The episode drew a crowd of onlookers and quickly escalated .

Videos posted to social media show some in the crowd appearing to try to interfere with the arrests. Federal agents are seen at times deploying pepper spray, punching a man who approaches the officers, and pointing a gun in the direction of another woman who opened the agents’ ve

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