When they couldn't chip humans, they chipped your pet.
Someone posted a pic of the classroom door earlier. There is no way for a cop to get shot outside the locked classroom unless they were stupid enough to stand in front of the tiny window. Not ruling that out.
On that note, the windows to the outside are wide open. Why didn't a police officer just go around the building and shoot him from outside the classroom?
https://www.krqe.com/news/weird/sketchy-description-police-search-for-suspect-accused-of-not-paying-for-gas/
Pic related. I kid you not. This was actually a sketch of the suspect. How the mighty have fallen.