ProPublica and FRONTLINE investigated more than 300 arrests of protesters and bystanders during Trump administration immigration enforcement sweeps in Los Angeles, Chicago, Minneapolis, and Charlotte. Over one-third of cases were dismissed, acquitted at trial, or never prosecuted. Video evidence and other documentation repeatedly contradicted officer statements, and prosecutors struggled to substantiate charges such as assaulting federal officers or interfering with law enforcement. Federal agents, largely inexperienced in crowd control, made widespread arrests that ultimately failed legal scrutiny.