Also, here are some very useful and informative smartphone apps that gives you a heads-up on any registered sex offenders. On your phone you can see a map of your area of interest with "thumb tack" like plots indicating that street name or proximity of where a sex offender resides (also shows a snapshot of the offender). Kinda scary, but better to be informed so you know what streets or neighborhoods you shouldn't move to. Since I use / have an Android based smartphone my personal suggestion are for Android phones and can be found in the Google Play store :
App name: "Family Messenger" [may also be called Family Locator] (manufacturer name: Life360)
App name: "Family GPS Tracker" (manufacturer name: Family Safety Production)
I'm not sure on apps for iphone, but I'm pretty sure there are apps for it.
Hope this helps.