I had problems with one of my neighbors and had approached him on my own the first time. Just got a blank stare back. The second time (this involved a firearm) I got the sheriff involved and thought it was taken care of.
Nope!

He decided he was above the law as he continued his behavior.
Again The sheriff was called and this time he was threatened with jail time. Problem solved so far as it has been months since the incident.

It can be extremely aggravating but it is best left up to the police. Maybe a trip to your local PD and have a discussion with the top officer. Good luck.

__________________
US Veteran 1970-1974