The reason the tenant took everything else and left they can be arrested for trying to keep it.

I was lucky however because I was able to get them thrown out and arrested for breaking and entering.

Let's see - oh, that's illegal and will get us arrested and sued!

As soon as they had this guy, I'd have him arrested for terroristic threats.Again, this is what I would do here in Pittsburgh, given the laws here and my skillset.

It doesn't matter if they are "squatters, tenants, neighbors, friends, relatives, whatever"...if they are purposely causing property damage and selling property they do not own they are criminals in the process of committing a crime and need to be arrested.

If he has never rented in the past, and he has never been arrested for anything, starting out with his credit, your not going to find much or anything on on him, he hasn't been has never been in the system....if possible you ask for a larger security deposit, and explain to due to his newly acquired standings your requesting more security, and explain that if he rents longer than his lease, you will return the extra deposit, as long as he is in good standings. 

You won't see these show on crime stata because the criminals are almost never arrested.

I was granted the Protective Order, but he violated it and was arrested, but unfortunately I wasn't granted an extension, so he came back to the house after it expired.Since he's been back he's become a completely different person, threatening to sue me for any reason and even telling me that the eviction letter I sent him is harassment.

We couldn't do cash for keys because the girl was on house arrest.

If he can possibly get her arrested, he should.