Does not matter, he was not cleared by security to be armed near a Presidential candidate. And he KNEW the policies. So sorry but he does not get a pass for being a cop in a high security setting like that.
Sorry, already been down this road with a friend that is a retired cop that actually worked a couple occasions a president spoke, both in uniform and out and all the local cops wore weapons. This was just blustering by either the SS or Trumps people.
In addition he also was around presidential relatives that came to town on mulitple times, flying in on AF2 as well as other government aircraft.