Personally, I hear more violent crime near Sherman Dr than any other part of town.

If you find something pretty bad, like a violent crime, I’d recommend consulting your attorney.Other than that it depends on what kind of relationship you want to have with the tenant.

Also, just because he has PTSD dosn't mean he is violent. 

I've had social workers working for agencies who routinely defend their client's behavior, as if violent, argumentative behavior, domestic violence, illegal drug use, violation of lease terms, and of course, always combined with non-payment of rent, were just a "cultural" difference. 

They are all bigger, stronger, and more used to violent behavior ...

They can get angry and violent at the piece of paper!

It's hard to find professional property management to manage the property for you in these areasF - this is the war zone: where 90% of the violent crimes in the city happens, almost every other apartment or house is boarded up.

I would screen out part-timers, enforce 3X on rent which a working class couple should be able handle, no felonies whether violent or not, evictions, etc.Your COC will be higher, be okay with no appreciation but have major equity in lower priced home with higher down payment amount

He's got nowhere else to go, no family, no money, and a violent felon record.

Now the victims could possibly sue you because you knew he was violent and making threats but you did nothing.