Federal immigration agents arrived at a work site in Compton and began asking workers for proof of citizenship, according to witness Abel Lopez. When some workers confronted the agents and told them to leave, the agents allegedly struck and chased the workers. Lopez said agents tackled and used a Taser on a man who is a U.S. citizen; the man was detained and later released. Video of the incident shows an agent exit an SUV, strike the man, and then chase him during the struggle.