There is two pieces of key information, which you need to know about villian:
<ul type="square">[*]Does he raise on a draw?[*]Does he overvalue TP/overpair hands even on dangerous boards?[/list]You can get this information either by having previously seen him make these plays (obv. one of the best methods to find out, especially if you observe this several times) or by extrapolating from other observations. Does he seem like a competent player who is capable of raising on a draw? Is he a fish who thinks "I have a pair, LOL, I raise"? Is he an insecure player who wouldn't raise without the near nuts?
Against a total unkown there is no shame in laying this down on the flop. Especially if there are targets at the table you would rather play with.
As played this looks too much like a value line here with something better than one pair. I would fold the turn.