if he is using a "banned" substance(per NFL rules), why wouldn't he and the Bills be proactive and go to the league prior to any drug testing that he knows he is going to FAIL!!
So the Bills either didn't know about it, making Henderson a moron, or the Bills FO was aware of it, making them both morons. I don't know how a player can jeopardize multi-million dollar contracts in the name of a substance abuse policy they think they can beat...or ignore.