It would really be against fair housing laws to answer this question. Instead, what is NOT against the fair housing laws, is to point you in the right direction.
Just do a simple google search for Huntsville Crime statistics and there are a few sites out there that will give you information, including a breakdown between "violent" crimes and "nonviolent" crimes. (Murder/Assault as opposed to car theft and graffitti).
As far as being a safe investment, I am not familiar with the Huntsville area. I recommend that you contact a local real estate agent and speak with them regarding that aspect.
Best of luck to you,
It's more than real estate. It's RAYL-Estate!
Brian Rayl, REALTORÂ®
Keller Williams Elite - Park Cities