Federal immigration officers shot and killed Alex Pretti, but the truly chilling part of this story is the aggressive surveillance approach federal agents were already taking with him and other protesters in Minneapolis. As reported by CNN, Pretti’s name was definitely known to federal agents, which is unsettling given what happened to him just a week prior to his death. Recommended VideosSources familiar with the situation say that about seven days before the fatal confrontation, Pretti suffered a broken rib after being tackled by a group of federal officers. This earlier incident began when Pretti saw Immigration and Customs Enforcement, or ICE, agents chasing what he thought was a family on foot. The Department of Homeland Security, or DHS, has defended the practice, arguing that it’s necessary to combat threats against federal officers.