No I don't know this person but I do know they took pictures of me and my vehicle and licenses plate which could potentially lead them to where I live also in a day and age of where people are committing random acts of violence it's hard tell if this person is a serious threat or not but if this person was a police officer as they claimed to be that could be equally as dangerous for them to be on the streets hence why I'm at a loss on what I should do
When I read through your other posts the first time, I was picturing in my head a person running after you on Pittsburgh city streets, and I realize now my picture may not have been correct.
Was the person who was following you and shouting at you driving a
car? Could the person's actions be the result of a road rage incident (where the person perhaps thought you cut him off in traffic or some such thing)?
Whatever the case, if you think the person could be a threat to your safety or to the safety of others, you might want to file a complaint and have the police investigate him further.
For some comfort, perhaps, this person would have to make quite an effort to locate you if all he has is your license plate number. Most people will not make that effort. And, unless he was in a car with police lights and he has something to point other than his finger, I think he comes across more as crazy than a serious threat. But, you are right - in today's climate, it is hard to tell who is a serious threat and who is not.