To clarify: He hasn't actually resigned. This is a letter that was found on Adams' laptop by the Attorney General's investigators, and has been released to the public this afternoon. It's not clear when Adams wrote the letter exactly, but it looks like it was written shortly before Adams delivered his press conference saying he was sorry, but that he intended to stay on. The letter was never actually read, but the fact that Adams had written it shows how close he may have come to actually resigning.
ADAMS RESIGNATION: THANKS "INTERIM MAYOR RANDY LEONARD..."