There are a lot of sites that gives crime rates but I think nothing beats talking to the locals.
One of the best place to check the statistics is the local policy department Usually Chamber of Commerce/Visitor Center is also very helpful. I would also suggest that you talk to a few neighbors around the area and find out about the neighborhood situation.
This is a recent post with a few sites for crime rate.
You can also talk with those who live in the neighborhood you're considering. Perhaps a drive out on a Saturday or Sunday afternoon to chat with those washing their cars or hanging out on their deck...