What is the possibility he's holding the T?

[Mitke]

That queen could have been red too...

As played: Call.

You have under-represented your hand strenght preflop. You hand looks a lot like a AX, X<T or even a semibluff with diamonds.

CO's aggression on the river looks like a maniac who likes to bluff a lot at pots and/or is otherwise overaggressive on the river. At least in my eyes.

If you were HU against this guy on the river I think b/c or c/c to induce bluff raise or bet could both be fine here.

Of course we cannot overrule a AK or AQ either as his PFR is so low. Yet, the raising post-flop aggression and high river number make me want to keep him honest.