2/4 AT rivered TP facing overbet

[Kakashi2314]

6max nl 2/4 effective stack 400
Villian is pretty unknown. We played around 25 hands and he seemed a little bit passiv but it is a small samplesize :-)

Dealt to Herro(Button) [10[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img]]
2 fold, Villian call 4$, Hero raise to 20$, Villian call 16$
*** FLOP *** [6[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/heart.gif[/img]] 46$
Villian check, Hero bets $36, Villian call $36
*** TURN *** [5[img]/images/graemlins/diamond.gif[/img]]$118
Villian check, Hero check
*** RIVER *** [10[img]/images/graemlins/diamond.gif[/img]] $118
Villian Bet $136.00, Hero ???

[Praetor]

such an easy fold, he has a 9/boat/78 always

[RunyonAve]

he missed his turn check raise, easy fold.

[Kakashi2314]

thanks for your help

I have another question

should I double barrel this versus an unknown?