Like I said in #5: her lawyer needs to find out the name of the complainant, and sue for libel and making a false statement. If the complainant was anonymous, then that is a real issue, since that means that anybody can get anybody into trouble with police by making false accusations, and the system needs to be changed.
Assuming she is in the right she should sue the accuser and have him pay all lawyers fees than a bit moire. No way can or will the accuser remain anonymous, he precipitated serious stuff.
My guess is the accuser works in the public sector and knows a few police there. Lunatic lefty retired teachers abound in NJ, NY, PA...he might be one
Reminds me of a recent personal situation. My son gave me a very good pellet rifle for birthday present. We have a wide backyard easy for a 25 yd target range. I set up an enclosed big box target very well backed with a thin steel plate and 2 inch concrete blocks. All this against the wooden fence. I checked the internet for any regs as to shooting the rifle in my back yard. The only applicable regs that might apply concerned after reasonable hours. I called the police department and asked them about regs and was told I only could not be a nuisance to my neighbors. On one day my wife comes to me in the backyard and says two policepersons were at the door because a neighbor said I was killing birds. I showed the police my target setup and was advised by a young ‘look at me’ cop that I was in violation of code. We didn’t hassle. Luckily I have a place in the mountains where I can use my birthday gift.