I want to know how you dealt with the neighbor!
Yes. Telling us the first 1/2 of the story with the ending of being happily resolved, fill us in on the outcome.
Can't do much about the cop. File a suit against his employer (City, county..) naming him. I suspect the only way the PD dept would admit their wrong doing is by force (read court judgement). If you cause enough headache in his name they might do something about him, otherwise he's probably very well insulated.