There is also a Sangamon County database.
Check Facebook to see if the subdivision has a community page. Many do and it is a great way to meet the neighbors and ask questions about the neighborhood from people who actually live there.
Contact the local police department for crime statistics. Some departments have get websites that will let you search for these statistics online.
Many local newspapers and new channels also track local crime statistics. Check their websites you may be surprised by the amount of information provided.
I have included link to a great example of ways to find community data. I realize it is for Atlanta but many of the links on this page cover the entire country. Please check it out.
This is somewhat of a tricky question. Crime can happen anywhere at anytime. Personally, I do not like the crime statics available on some of the real estate websites. These statics are very general and often include things that aren't a crime that a homeowner would be concerned with, example: DUI ticket two blocks away.
This house at 4013 McCormick is outside of Springfield city limits and in Riverton school district.
If you aren't already working with a Realtor, please give me a call. We could go see the house and neighborhood in person. Hopefully this would also give us the opportunity to talk with neighbors to see if they've ever had any problems.