That's pot, right? There's no way that's not pot. And while it's not our role to say whether pot use is wrong or right, the NFL surely is in that position when the user in question is an NFL receiver.
The internets caught wind of this photo, purportedly from Bess' Instagram account, of Bess smoking.... something. Yeah, probably weed. The photo's date is unknown, but it, like Bess' whole Instagram account, is gone now. (Screengrab via Waiting For Next Year.)