The police departments in many of the communities subscribe to http://www.crimereports.com ... which is the site Bryce mentions below. Some communities do their own maps so i usually google ... crime maps ________________ (city name) to find the best ones.
Calling the local police station is a good idea. If you want a quick snapshot of all the activity I usually tell clients to go to http://www.crimereports.com and you can type in the specific address or area and the time frame of the incidents and you will get a good bit of information. You may also want to check the Megan's law website to see where any registered sex offenders may be.
J. Rockcliff Realtors
What information are you looking for? If it's crime regarding an address, I suggest that you hear it first hand by calling the police department and ask for a crime report for a specific neighborhood.