He could have bought the meds, the financial community is rife with all kinds of drug dealing, and more. He wouldn't need a prescription to get them illegally.
What a moronic idiot. If he had never done this before ( I highly doubt it, especially in that field of work, and it is a small firm) then why attempt it during a flight?
I am not taking anything away from bus drivers or others, but a bus driver and the occupants have the ability to leave, passengers on the plane, can't open the door and leave.
I wonder, if the nationality of the perp wasn't anglo, what would have happened?