help with this laydown

This hand left me all confused. He says he had AK, but there's no reason to believe him since he limped. Should I have led out the turn with a bet to see where I was at and to protect from a bluff? Any comments appreciated.....

Hand #4215836-29 at SnG-0009o (No Limit Hold'em Sit and Go)
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Started at 30/Jan/05 16:58:07

pairof4s is at seat 1 with 930.
jstosh is at seat 2 with 530.
squidly1 is at seat 3 with 1710.
grunnymoney is at seat 4 with 1080.
foldem up is at seat 5 with 1655.
flyingcatfish is at seat 6 with 1210.
river815 is at seat 8 with 2010.
Senfan is at seat 9 with 875.
The button is at seat 6.

river815 posts the small blind of 20.
Senfan posts the big blind of 40.

pairof4s: -- --
jstosh: -- --
squidly1: -- --
grunnymoney: Ah 4h
foldem up: -- --
flyingcatfish: -- --
river815: -- --
Senfan: -- --

Pre-flop:

pairof4s folds. jstosh folds. squidly1 folds.
grunnymoney calls. foldem up folds. flyingcatfish
calls. river815 calls. Senfan checks.

Flop (board: 6c As 4s):

river815 bets 40. Senfan calls. grunnymoney raises
to 185. flyingcatfish calls. river815 folds.
Senfan folds.

Turn (board: 6c As 4s 3s):

grunnymoney checks. flyingcatfish goes all-in for
985. grunnymoney folds. flyingcatfish is returned
985 (uncalled).

You're too weak/tight. This leads to a lot of "look at this good laydown" sort of situations. You need to drive the betting on the turn again. You can just camp for the nuts and bet them.

Lead the turn, fold to the AI unless the opponent is a fish.

-'rilla

It's too early to be risking it. The AK is questionable; it's really hard to tell without a read on him. If he has the AK, and he's feeling like he wants to push his chips he should have done it on the turn with the flush draw on the board. Maybe he's just stupid.