Chicago police officials say an officer killed this week was accidentally shot and killed by her partner after they encountered someone with a rifle when they chased a suspect into an apartment.

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.

Chicago police Officer Krystal Rivera was fatally shot by a fellow cop during a confrontation with an armed suspect Thursday, police have announced.