I hope he don't try to fly, or take a train, or cross a frontier in a few years, or things could escalate really fast. Some people wouldn't need much more excus

I hope he don't try to fly, or take a train, or cross a frontier in a few years, or things could escalate really fast. Some people wouldn't need much more excuses to shoot first and ask later. I wonder if the local sheriff could give him a small signed note explaining the problem to be shown to other policemen just in case. To assure at least that the local police in this place is aware of the situation (maybe ask them directly for advice?) could avoid future troubles.