If they don't know the firearms laws in regards to carrying/transporting them, in their own state, well, they should not be involved in law enforcement.
Or they don't think citizens do so they try to get away with more.
I think you are closer with this point.
For the record I want to say, I personally feel all firearms laws should be eliminated, EXCEPT those directed at felons and the mentally ill. Many states have made an absolute mockery of the 2nd Amendment. In addition, I feel states and counties that deny law abiding citizens CCW permits should be held TOTALLY liable if those citizens become victims of crime.