A Chicago police officer was shot and killed during an armed confrontation in a Chatham apartment Thursday night, authorities said.

Chicago police are investigating how a police officer was shot and killed while conducting an investigatory stop in Chatham Thursday night. Officer Krystal Rivera was among officers on a tactical team who were on patrol in the South Side neighborhood when they attempted to conduct an investigatory stop in the 8220 block of South Drexel Avenue just before 10 p.