He announced in Phoenix that he wasn’t going to announce it. He waited to announce till a Friday news dump in the middle of the hurricane.
Please quote the provision of the Constitution of the United States that you say supports the conclusion Arpaio was doing his job. I’ll be waiting for that. In particular, quote the provision allowing law enforcement officers to stop people without any reasonable suspicion they have committed a crime, but just because of their race. I’ll be waiting for that too.
I linked the Supreme Court case finding that accepting a pardon is to admit guilt. That’s the kind of thing lawyers do.