Follow the link to the places where they say not to buy real estate. You don't have to exactly be a brain surgeon to figure out that homes in these areas wouldn't exactly be a good investment.
Here's a spoiler. Drum roll, please, most dangerous place in the US is EAST SAINT LOUIS (in Illinois, not Missouri).
My sales manager used to tell me to make appointments with the federal courts in E STL. Good thing that I had tenure, because I always refused and told him to assign the accounts to someone else. A commission wasn't worth risking my life--or my car. Back in the day I drove a BMW (no longer have one). I can't even imagine how fast that would disappear while making that sales call. Oy!