I would think carry permit laws are something a street cop needs to know so he want get himself are someone else killed. You can jump up and down all day and say Mark was bating the cop, but if the cop knew the law none of this would have happen.
At the beginning of it all the cop sounded on edge what if a car backfired at that time? Boom dead man not braking any laws. Cops are paid to think would it be a good idea if you see someone walking down the street with a gun in a holster not bothering anyone, you should get backup then stop him and ask questions.
I hope Sgt. Dockery will think a little more next time before jumping out his car and drawing down on someone