Well the town Butler supposedly has 12 patrol officers and admin, but the Butler Police weren't the only local police on the scene, I assume the area outside the SS perimeter was charged to the local police, state police, and federal authorities. It was hardly a manpower issue NBC states there were dozens of officers (local, state and federal) on the scene and 4 Butler Township police were the ones that tried to confront the shooter. Also, I read somewhere that there were officers (not sure their affiliation) inside the very building the shooter was on. An elevated position with a line of sight to the former President left completely unattended that was in the zone of control of the local police. Id say they effed up. I am not exactly sure who the person is that was in charge of the combined group of law enforcement. Maybe it was a collective command who knows, but the point is they failed and lucked out that the shooter was errant.