You can't make the prosecutor do anything. They have ultimate discretion as to what cases to pursue, and which not to pursue.
The prosecutor's job is to prosecute CRIMES...that means cases that either (a) constitute a crime as defined within state statutes or (b) cases that have support of precident that indicates such a prosecution would be successful. They've already indicated that there's no predicent, so that leaves you with finding a SPECIFIC Ohio criminal statute that you believe is being violated. Even prosecutors don't know every single law on the books, and if you can point out a particular statute, it may help. I've browed through them, and don't see ANY listed criminal offenses that fit the nature of the situation you describe (because it's likely a TORT, not a CRIME). You can find the Ohio criminal statutes and read them for yourself at:
http://codes.ohio.gov/orc/29
Be aware however, that even IF you find one, you still cannot FORCE a criminal case to be brought.
Do some research on the internet to learn the difference between a TORT and a CRIME. This will help you to understand the nature of the case.
Invasion of privacy cases are typically CIVIL torts, not CRIMINAL offenses (unless as noted there were elements like voyerism of children involved). That's why your course of action, if you want to pursue it, is to do exactly what the prosecution indicated: sue the guy in civil court for the TORT (not crime) you claim he's committing. You absolutely DO have rights, including the right to sue - but you have to AVAIL yourself of that right.
If you choose to sue (which is really your only option short of finding something obscure in Ohio statutes that makes his actions criminal), you need to know that civil suits focus on damages. Your best case outcome from a civil suit is that the court order the neighbor to move, remove, or alter the camera, and, if you've requested it, to pay for any attorney fees you incur to bring the case. If the neighbor's conduct is found to be outrageous, and not just simply annoying or unsettling, there is the potential for punative damages (money the court orders the defendent to pay as a punishment). These are the things you need to discuss with a local civil attorney.
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While pointers can be helpful, ultimately the number one lesson in any legal action is: don't take legal advice from books, family, friends, co-workers, police officers, grocery clerks, web sites, or people on legal message boards. The only person who can give YOU legal advice is YOUR attorney.
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