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.

Officer Krystal Rivera was excited to celebrate her daughter's 11th birthday this weekend. But Rivera's life was tragically cut short late Thursday, when she was fatally shot in the back by a bullet fired by another officer.