LA relaxed some of its building rules, builders came in and built a lot of higher end units, the police moved the bums along out of the area and high end restaurants and shops started to move in. 

Most police departments can help you get these. 

In addition to using google maps to walk the areas, look at crime heat maps as well as just calling the police station and asking.

They don't care about the noise, or you, and noise violations as you being the landlord are probably not a court worthy eviction cause,, especially with out police calls.. you don't have to say why your non-renewing just your non-renewing. 

I don't want to play police, judge, or therapist.

You're the guy whose hand they're grasping to stay out of the abyss.I think you'd really be surprised how much the most hardened police officers and child welfare caseworkers will typically respect the difference between a responsible landlord of low-cost properties and a slumlord. 

@John Thedford Personally, I have no problems with guns in the hands of law-abiding citizens but I'm also biased since I grew up around guns (my dad was a police officer). =)

When I have a tenant move in, I let them know how slow police response time in our area is and advise them to practice their 2nd amendment right ;)

There is a reason why as much as two thirds of City of LA employees don't actually live in LA and why only 21 percent of police department or 16% of the fire department actually live in LA -- they can't afford it but these are a substantial amount of the people who will be in the market to buy or rent.

But then we complain about crime and cut police and not let them enforce the laws.