CRAI on river with trips top kicker

[waldo027]

Villian is 32/15/2.14 after 420 hands. A little loose, somewhat passive. Haven't seen any anything strange from him yet.

Full Tilt Poker, $0.10/$0.25 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

SB: $38.15
Hero (BB): $36.45
UTG: $45.60
MP: $25.05
CO: $10.40
BTN: $7.30

Pre-Flop: A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/club.gif[/img] dealt to Hero (BB)
2 folds, CO calls $0.25, BTN folds, SB calls $0.15, <font color="red">Hero raises to $1</font>, CO folds, SB calls $0.75

Flop: ($2.25) 6[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">SB bets $1.25</font>, Hero calls $1.25

Turn: ($4.75) J[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $4</font>, SB calls $4

River: ($12.75) A[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $10</font>, <font color="red">SB raises to $30.20</font>

Is the river CRAI ever a bluff at these stakes? I expect either 66 or 77 most of the time, maybe JJ or AJ, and rarely to see a worse A.