Chicago police Officer Krystal Rivera was mistakenly shot and killed by a fellow cop during a confrontation with an armed suspect late Thursday, according to police, who continue to hold at least

Police confirmed that the only person who fired a weapon during the chase was an officer, "whose gunfire unintentionally struck Officer Rivera."

Adrian Rucker is charged with confronting police while armed with a rifle, which led an officer to open fire and fatally shoot Officer Krystal Rivera Thursday in Chatham.