Warren King, a 19-year-old U.S. citizen born and raised in Chicago, was tackled and arrested by federal immigration agents at a Walgreens store on the East Side during an operation targeting undocumented immigrants. King was shopping with friends and family when agents swarmed the store; he was arrested despite repeatedly telling agents he was a U.S. citizen and legally in the country. He was held for hours before being released without charges, left with physical and mental injuries from the takedown.