CHICAGO - Chicago Police Officer Krystal Rivera was accidentally shot and killed by her partner during a confrontation with an armed suspect Thursday night on the South Side, officials said.

"The first question is, was it an intentional fire shot or accidental discharge?" said former CPD Supt. Garry McCarthy.

The backstory:

The Cook County Medical Examiner's Office said Rivera was shot in the back. It happened Thursday around 10 p.m. at 82nd Street and Drexel Avenue. Police said Rivera and her partner stopped a man who eventually ran into a building. When officers chased him, police said they were confronted by a man with a gun.

"Rivera was in the process of investigating someone in possession of a gun. At some point, a weapon was pointed in the direction of those officers", said C

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