Chicago Police Officer Murdered, 4 Teens Charged.

Four teenagers, including a 16-year-old, have been charged with the murder of 24-year-old Chicago police officer Aréanah Preston, who was shot and killed after finishing her shift. The suspects are believed to be connected to multiple robberies and a car theft prior to the murder. They allegedly pulled up in a stolen car and fired at Preston, stealing her gun before fleeing. The suspects face charges of first-degree murder, armed robbery, and arson. Preston's gun has not yet been recovered.