Awesome that you are concerned about the neighborhood BEFORE you buy! Are you relocating, or are you able to drive the area? A wonderful place to begin research is www.city-data.com You can also look at www.greatschools.com as well as https://www.google.com/search?q=crime+statistics+jacksonville+fl&ie=UTF-8&oe=UTF-8&hl=en&client=safari I just googled "Crime Stats Jacksonville FL.
If you are not already working with. Realtor, I would be more than happy to send you some maps and information about my city!