Just speculating, but he could have seen the Obama writing on the wall and knew he could do whatever the hell he wanted. I mean Obama is the guy, after all, who instead of enforcing federal laws that made marijuana illegal helped banks normalize it when it started being decriminalized on a state level. Funny how this guy is getting caught now only after Obama leaves office.
It took so long because the contractor managed to bribe a high ranking memebr of the inveatigation too. A mole will make it pretty hard to catch someone. For the record, i consoder that guy to be a traitor too.
And the executive order you brought up happened 3 years after thos incident.