I have no idea, but my guess is that somebody is looking for an excuse to get a search warrant on ProtonMail. Odds he has a "client" in the same room with him to send the email? Do you suppose that's really his ProtonMail account? Do you suppose the mods should message ProtonMail and tell them they have jack booted thugs on the way? I mean, I'd almost send an email myself to this address to warn whoever it is that he's being gaslighted as a hit man for some reason, but I don't want the Government of China or whoever knows what the original address was for to start cracking my case.