Here is a site that I signed up for awhile ago that will send you notifications of sex predators in your area. It shows address, picture of predator and what they were convicted of.
They email you when one has moved in and out of your area. It was shocking to see how many live close to me and I live close to an elementary school. The pictures are helpful to know who you may be looking out for. GREAT site. I highly recommend it.
http://www.familywatchdog.us/