Chicago police say an officer was accidentally shot and killed by her partner

CHICAGO — A Chicago police officer was unintentionally shot and killed by her partner after they chased a suspect into an apartment and encountered another person with a rifle, officials said.

Krystal Rivera, 36, a four-year veteran of the department, is survived by a 10-year-old daughter.

The partner was the only person who fired a weapon, and the “gunfire unintentionally struck Officer Rivera,” city police said in a statement Friday. An autopsy showed she was shot in the back.

Rivera died at a hospital late Thursday, less than an hour after being shot.

Colleagues had brought her to the hospital in a squad car that crashed and caught on fire due to a malfunction, according to Police Superintendent Larry Snelling. She was then transported in another squad car.

The person who alleged