I didn't comment on this at the time as I was still employed by the DOT and I did a lot of work in legal cases involving revocation of airmen certs for air carrier pilots (by a lot, meaning the cases are rare, but when I got a case there was a lot of work to do).
I still ethically can't say in a public forum anything I know about this case that's not in a public record though.
BUT, in this case, like cases involving "drunk" pilots (attempting to or operating an aircraft with a BAC over the FAR limit) the FAA doesn't necessarily revoke the pilot certificate. In most cases (except some involving drug running and other such cases) the revocation allows the pilot to reapply for all certificates after 1 year. They have to take all the checkrides for recertification again however, though their experience still counts towards the requirements for taking the check. But in the case of someone with a drug/alcohhol problem, that's not ideal so rather than the FAA revoking the flight certificate the FAA airmen medical branch (through coordination with headquarters in Washington DC) denies (voids) the persons medical certification, without that you can't fly. If you look him up in the faa.gov database there's a number to call there for medical info. If he even tries to reapply for medical certification it's going to be a big NO. Even for alcoholics, who don't have "incidents" and simply report their issue voluntarily and go through a formal HIMS FAA process for recertification of medical privileges it can take 8 months. In Emerson's case, I don't think he'll ever have the opportunity.