The hexachloroethane smoke that police used against protesters can cause vomiting, respiratory distress and death
February 21, 2021 1:29PM (UTC) Federal officers walk through tear gas during a dispersal of about 300 protesters in front of the Immigration and Customs Enforcement (ICE) detention building on August 26, 2020 in Portland, Oregon. Protests continued for the 91st night in Portland as activist called for solidarity with rallies in Kenosha, Wisconsin. (Nathan Howard/Getty Images)