Trulia has a Crime Maps feature which can help you determine the crime levels of neighborhoods.
To find the Crime Maps feature in the Charlestown, follow this link:
If I can help with anything else, just let me know!
Community Manager, Trulia Voices
If you are local, I recommend visiting the local police precinct or visiting this web site:
Real Estate Professionals are barred from directly commenting on crime rates in specific areas because it is considered 'steering' consumers away from neighborhoods.
Let me know if this information is useful and if you want further information or access to rental properties in Charlestown.