Late to the party just got on BUT you can search any domain registray to see if they are registered in his name (unless he used a fake name).
Seems legit as they are all (mostly) hosted on the same 2 web servers (consistency) and most look like they are formed to take advantage of mid-typed searches (ex: wellsfargodelerservices.com) listed multiple times with misspellings.. could possibly scam $$ from unsuspecting people. Did not have time to investigate any of them or to look for child porn related etc.. pretty easy to hide or fake the name of the owner or registrars BUT they do have to be PAID for so there is a money trail there for yearly cost of www and website hosting.
Hope this helps!