A Chicago police officer shot and killed a fellow officer during a tactical operation Thursday night, police said.

The Chicago police officer killed in Chatham was identified as 36-year-old Krystal Rivera, a mother and a four-year veteran ...

A 36-year-old police officer who was a mother to a young daughter and four-year veteran of the Chicago Police has been shot ...

Chicago police officials say an officer killed this week was accidentally shot and killed by her partner after they ...

Police confirmed that the only person who fired a weapon during the chase was an officer, "whose gunfire unintentionally struck Officer Rivera." ...

Police revealed a major update in the case of Krystal Rivera, a 36-year-old Chicago police officer killed Thursday night.

A Chicago police officer was shot and killed unintentionally by a fellow officer Thursday night during a foot chase on the ...

Chicago police Officer Krystal Rivera was mistakenly shot by a fellow cop during a confrontation with an armed suspect that ...

Chicago Police Supt. Larry Snelling said the officer who unintentionally shot and killed Officer Krystal Rivera is dealing with difficult emotions, and he's urging the public not to draw conclusions ...

Anthony Vazquez / Sun-Times file Share Chicago Police Officer Krystal Rivera was “unintentionally” shot and killed by her partner when they encountered an armed person during a foot pursuit ...

The latest updates on the Chicago police shooting can be found here. Our original story continues below. A Chicago police officer was shot and killed just before 10 p.m. Thursday on the city's ...