You just have to have the right Contractors and Designers and Deal-spotters on your team!

As Armin mentioned, you will definitely want to pay close attention to the crime maps and shot spotter maps.

I've already requested a meter spotter to come out.

Definitely use Colin's advice on using the crime spotter. 

My feeling is a war zone may be defined by a street that has the shot spotter system in place. 

Here are 18 ways to market to sellers...1) Properties that are FSBO2) Properties that are FRBO3) Direct mail to listed houses4) Direct mail to absentee owners5) Contact agents to work with you6) Contact insurance companies to reach out to the clients that have non-owner occupied properties7) Go to REI meetings and network with other investors/agents8) Bandit signs9) Car wrap10) Web Scraper11) Pay a referral fee to owners and agents12) Look for properties that have weeds13) Contact the city for a list of houses that have had the water turned off in 30 days. 14) Divorce attorneys15) Contractors16) VA’s to call FSBO and FRBO ads. 17) Hire a Property Spotter ($10 hr and require 5 leads per hour. 18) Zbuyer.com

I am what is generally referred to as a spotter or bird dog.

I also check neighborhoodscout and crime spotter.

Here is the MPLS shot spotter maps, crazy that they have to update this weekly!!