Trulia has a link to crime statistics in all cities, I would recommend you check it out if it is of concern to you. I also tell many of my buyers it's a good idea, especially now that the weather is better, to walk a neighborhood that you intend to buy in at different times of the week. See if there are kids out, see how many families are out talking with each other, etc. The way the residents of a community interact has a huge impact on the "safety" issue.
If you are interested in a specific home, contact me with the address and I will be happy to set up an appointment for you.