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I am sorry to hear about this situation.
First of all, this is a civil action, not criminal. This is why the police declined to investigate. He did not trespass with malicious intent. This was an actual accident, and the civil court would decide. You can sue him for civil trespass, interference with chattel (interference with possession of items), and civil nuisance. However, you would have to bring this in civil court, not criminal.
It seems that he may be attempting to get leverage, revenge, or both, by filing complaints against you for noise and ordinance violation. Unfortunately the authorities have to take each complaint seriously so they will investigate, but if the complaints are groundless, they should be dropped. In addition, you can add "defamation" to the list of causes I listed above, if it is shown that he was the one that filed a complaint which was actually false in nature.
Yes, you may wish to get counsel. Not because you have to, but, because if this neighbor is malicious, he may try to play you using the system. To avoid being entangled, it is best to use an expert to fight back.
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