1. anyone who is pardon by the president of united states of a crime is a criminal and are guilt on all counts. Otherwise there is no need for a presidential pardon to begin with. There is no need to pardon an innocent citizen if you're not guilty of wrongdoing.  
2. arpaio is a test case for trump on his own pardon. trump will pardon himself first, then his family and friends. after that. the russian mob business partners sader and arif.  arpaio was not convicted of a crime. he was only charge of a crime. the justice department  did not see all the evidence. and like trump's racketeering business ties. trump will not allow the sins to be exposed. after all, making sure his propaganda his brand is targeted to the same arpaio supporters are more important than running this country. trump will alway put himself, his brand first.