flopped trips, re raised on turn

Suited connectors in LP, I limped and flopped trips, bb is LAG, no read on UTG1, MP2 is solid.

Preflop: Hero has 4 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/club.gif[/img] in CO
UTG folds, UTG1 calls, 2 folds, MP2 calls, Hero calls, 2 folds, bb checks

Flop: (4.5 SB) 5 [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/spade.gif[/img] <font color="blue">(4 players)</font>
bb checks,<font color="red">UTG1 bets</font>, MP2 calls, Hero calls, bb calls

Turn: (4.25 BB) K [img]/images/graemlins/club.gif[/img] <font color="blue">(4 players) </font>
bb checks, <font color="red">UTG1 bets</font>, MP2 calls, <font color="red">Hero raises</font>, <font color="red">bb 3-bets</font>, UTG1 calls, MP2 calls, Hero calls

My read at this point is that bb has at least trip 5's with a better kicker than my 4, maybe a boat since he was the bb. I figured UTG1 has pp, or hit K on turn and MP2 has flush draw. The pot is too big to fold, but should I have capped the turn? Should I raise on the river, or, just call?