What do you do with this one?

I had a strong suspicion that he flopped trip jacks on this hand.

***** Hand History for Game 2293372744 *****
$100 NL Hold'em - Friday, July 01, 16:49:27 EDT 2005
Table Table 36950 (6 max) (Real Money)
Seat 2 is the button
Total number of players : 6
Seat 1: chippstaker ( $35.36 )
Seat 2: Jobron ( $277.3 )
Seat 6: stressball10 ( $124.35 )
Seat 3: GDAWGMCK93 ( $53.15 )
Seat 5: pjlfc ( $100 )
Seat 4: jackw144 ( $135.77 )
GDAWGMCK93 posts small blind [$0.5].
jackw144 posts big blind [$1].
** Dealing down cards **
Dealt to stressball10 [ Qh Kh ]
pjlfc folds.
stressball10 raises [$3].
chippstaker folds.
Jobron folds.
GDAWGMCK93 folds.
jackw144 raises [$4].
stressball10 calls [$2].
** Dealing Flop ** [ Tc, Kd, Jd ]
jackw144 checks.
stressball10 checks.
** Dealing Turn ** [ Kc ]
jackw144 checks.
stressball10 bets [$4].
jackw144 calls [$4].
** Dealing River ** [ 4s ]
jackw144 bets [$70].

Muck that faster'n bananas through a syphilitic baby. It sucks folding this hand, but you want a cheap showdown on this board. It looks like a poor slowplay to me. Did he show?

Sadly no. I asked him if he had a boat and he didn't respond.

Fold, he's either got a straight or a boat, probably a boat. He's overbetting the pot by 4 times; he's not bluffing.