UCR data is published annually by the FBI.UCR data is reported as either violent or property crime, which then break down further into eight possible sub-crime categories.

I could see you being required to rent to violent felons, people with multiple evictions, terrible credit, etc. 

If it's a lot of police blotters and violent / property crime reports, I know it's a D-class neighborhood. 

An ADT sign in the yard and a Ring door security system helps.Funny/true story: I remember one evening when a goof ball living in the crack house next door got so drunk and violent his GF threw him out and locked the door.  

Before pulling the trigger I would recommend looking at local crime reports targeting violent crimes and walk the neighborhood. 

And potential violent crimes make the property worth even less.

In a worst-case scenario, it would be aggressive and violent tenants who don't want to leave and would physically resist removal from a property and that could be dangerous.

@Charles Seaman I think we're in violent agreement that this will be a different kind of recession (though they're always different in some ways from the last one).

However, once you do about 3 evictions in 5 months or people don't want to rent your unit because a violent crime just took place a week ago (the entire neighborhood knows, but YOU don't cause you don't live there) or when the tenant obliterates the unit and you have to spend $10,000 on turnover, the returns are a joke and not worth the time.

Haha....ok I'm joking, kind of...All those things are important, but first is credit score(700 or better preferred, can go lower if other conditions are optimal) and no previous evictions, no felony convictions(especially violent or sexual).