He stated that when he found this out, he broke things off with the young lady, but she told her mother, a Houston police officer about the relationship. 

She called police and told that landlord is harassing her.

If it's because there's a ton of crime and it's actually dangerous/you're likely to have any repairs you do undone, you'll want to start talking to the local police and politicians -- you want them to step up patrols in that area to kill the crime element.

The neighborhood has plenty of police reports, gang tagging, drug houses, and what I call internal violence, but it is not drive by shootings and the crime stats are not significantly worse than my nearby middle class neighborhood.  

I got a Tracfone to use for my bandit signs to avoid hassles with the sign police. 

I intentionally don't sound real polished when I call people.  

If the area is gentrifying, get involved on the community level too to keep the area on the rise.We partner with law enforcement and took the classes that the city police and county sheriff offered on reducing crime and improving the safety of neighborhoods.

He lost a great tenant who was there for over 2 years because he wanted $25 more a month, and turned out she was on a fixed income (which he knew), so she moved, house sat vacant, next tenant required eviction (judgment, never recovered), next ones had the police there constantly.

By the way, I have contacted the state Fraud division, and county police on several of the parties involved - just to steam it up a bit.

(You'll need copies of the police report showing the address and the activity.