[EnderW27]

I still believe this villian is on a draw. Let's imagine he's made his hand.
He has two pair or a set. There are about two hundred different straight draws out there now including the likely JT his opponent could have.
He has the straight. There's a flush draw out there now and the board is still threatening to counterfeit his current straight.

In short, this board is scary even playing against one opponent. If he had a hand he would bet. It's that simple. I know if I were in his position (OOP I might add) and had a strong hand I simply could not risk giving a free card here.

So my conclusion remains that this guy has top pair at best, total bluff at worst, and is quite likely on a draw himself. You must bet out. Must.

If it turns out he had a hand and check raises us out of the tournament we can take solace in knowing this guy is a complete idiot.