http://www.crimereports.com/# will give you up to date accounts of crime in various areas. Just type in the specific address and it will give you everything from burglaries and assaults to registered offenders.
I suggest you drive by nearby neighborhoods at different times of days, during the week and on weekends. Write down what you like and don't like about the area taking into account crime and safety information you learn from http://www.crimereports.com/# .
Also you should speak to your REALTOR or agent about your concerns.
Hope this has been helpful!
Prudential California Realty