PS 320 wed- kk on scary board- what's the best line?

[NfldPwns]

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PokerStars Game #12556732911: Tournament #63182603, $300+$20 Hold'em No Limit - Level III (25/50) - 2007/10/10 - 21:40:51 (ET)
Table '63182603 50' 9-max Seat #6 is the button
Seat 1: CUTboy11 (2955 in chips)
Seat 2: DeuceBuster (2565 in chips)
Seat 3: fashion88 (6670 in chips)
Seat 4: Krone2727 (3280 in chips)
Seat 5: Jaral (1415 in chips)
Seat 6: PURPLEPILS99 (2950 in chips)
Seat 7: potstabber10 (550 in chips)
Seat 8: forum199 (3045 in chips)
Seat 9: Pok3rGod (3610 in chips)
potstabber10: posts small blind 25
forum199: posts big blind 50
*** HOLE CARDS ***
Pok3rGod: folds
CUTboy11: raises 100 to 150
DeuceBuster: folds
fashion88: folds
Krone2727: calls 150
Jaral: folds
PURPLEPILS99: folds
potstabber10: folds
forum199: folds
*** FLOP *** [3h Th 2s]
CUTboy11: bets 250
Krone2727: calls 250
*** TURN *** [3h Th 2s] [6h]
CUTboy11: checks
Krone2727: bets 400
CUTboy11: calls 400
*** RIVER *** [3h Th 2s 6h] [As]
CUTboy11: checks
Krone2727: checks
*** SHOW DOWN ***
CUTboy11: shows [Kh Kc] (a pair of Kings)
Krone2727: mucks hand

I"m posting for my brother, but I'm not sure what is the best line here...thoughts everyone?