Police officer, 36, killed after colleague ‘accidentally shot her in back during chase’ as tributes paid to ‘tough’ cop

A POLICE officer and mum-of-one has died after her colleague “unintentionally” shot her while on duty.

Krystal Rivera, 36, was killed during a confrontation with armed suspects in Chicago.

X/@Chicago_PoliceKrystal Rivera, 36, was tragically killed by another officer[/caption] Rivera (right), pictured with friend and former colleague Mary Rae, had been in the police force for four yearsFacebook FacebookRivera’s death on duty will be investigated[/caption]

The tragedy...