Anyone remember the couple, I think they were in florida, went on a shooting rampage, then went in a grocery store. Cops go in after them, one officer is headed towards the sound off gun fire as people are running out past him, except one girl was just walking slowly. He was so tunnel visioned on the sound of the shooting that he didn't process that it was off.
It was the female half of the couple. As soon as he walked past her she turned around, followed him and shot him from behind. Last time I saw it was in the academy. I'm looking for it to send to a buddy for training purposes but can't find it anywhere. My google fu is failing me.