400NL nustraight four cards on board three flush board hand

[Vinetou]

PokerStars No-Limit Hold'em, $4 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($344.25)
CO ($209.25)
Button ($230)
Hero ($396)
BB ($397.20)
UTG ($406)

Preflop: Hero is SB with 9[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, CO calls $4, <font color="#666666">1 fold</font>, Hero completes, BB checks.

Flop: ($12) A[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, CO checks.

Turn: ($12) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, CO checks.

River: ($12) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $12</font>, BB folds, <font color="#CC3333">CO raises to $24</font>, Hero calls $12.

Final Pot: $60

Should I move in here? I don't have any reads on a guy. I thought that we are either splitting or he made a backdoor flush so I decided to call. I couldn't see any donk doing it with the worst hand than I have. But I don't know anything about him so what would you do here against unknown?