However, if they don't know, it's only because they don't know where to look. Finding the appropriate resources to help you in your search for information is every Realtor's responsibility! It's not for me to decide that you are uncomfortable with X number of homicides, or even X number of dog barking violations...that's for the client to decide.
Hiding behind Fair Housing and a fear of being sued is no excuse for irresponsible agency. You give the client the information...let THEM decide! Check out the site below and decide for yourself. Straight from the horses mouth!
REALTORs cannot answer this question due to strict legal guidelines. We cannot "steer" a client to or away from any property due to it's neighborhood. General crime stats are available here on Trulia. Just go to the "Real Estate Guides" tab up top and type in your zip codes. You should also check with the local police department of the areas you are considering. They would be happy to help, and are probably the best and most accurate resource. Best of luck and happy hunting!