"That officer is in a very, very tough place; unimaginable what that officer has to be feeling right now," Chicago Police Supt. Larry Snelling said.

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.

Officer Krystal Rivera of the Chicago PD died after being unintentionally shot by another officer amidst a confrontation with a suspect. Her death has deeply affected the city and her colleagues.