KK misplayed?

[Small Fry]

Full Tilt Poker
Limit Holdem Ring game
Limit: $3/$6
9 players
Converter

No real hard and fast stats on CO but I haven't seen him get out of line.

Pre-flop: (9 players) Hero is UTG with K[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">Hero raises</font>, 3 folds, CO calls, Button calls.

Flop: T[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/heart.gif[/img] (7.5SB, 4 players)
<font color="#cc0000">Hero bets</font>, CO calls, Button calls.

Turn: 8[img]/images/graemlins/diamond.gif[/img] (5.25BB, 4 players)
<font color="#cc0000">Hero bets</font>, <font color="#cc0000">CO raises</font>, Button folds, Hero folds.



Should I have check / called Turn to see the river cheaply? Did I give up to quickly? Does anyone call this raise? Anybody check the flop?

Thanks