With one search, you can search through more than 650 million criminal conviction records from counties, department of corrections (DOC), administrative office of courts (AOC), and offender registries from all 50 states, plus Washington DC, Guam, and Puerto Rico.
Check of sex offender registries - with information from 49 states, plus Washington DC, Guam, Puerto Rico and various tribal sex offender registries, with photos in all.
Search of national security sources, including terrorist watch list of the US Office of Foreign Assets Control (OFAC)