Not another moanrathon...
What were you expecting the cop to do, /me takes reaches into his holster, /me takes out pepper spray can, and /me aims it at the suspect while the said suspect is busy bunnyhopping away? We do not need to RP every single action that is executed.
About killing surrendered suspects, cops also get fined 1k for doing so. Unless abused, it is in a way the fault of the suspect also, since he had plenty of time to /gu before the cops accidentally shoot him down at the last second.