[Buck_65]

This is quite odd. You're check-raised on the turn by the CO with only you left to act. If CO knows you're a TAG, he may make this play thinking you may fold immediately since he thinks he's representing a 6. A 6 better not be check-raising the turn from that position, that would be retarded, so I don't know what the hell is going on.

You raise the river and he folded?

Edit: To clarify, I think folding is the best option by a wide margin. However, raising seems to be a somewhat valid option in my opinion. I definitely don't call.