[GTSamIAm]

If he's as fishy as you say he is, I could almost see folding the river after being check-raised. Looks like Mr. Fish got a big hand and now has FPS.

I would never ever ever rr KQ vs. UTG raiser, as everyone says it's awful. Maybe flat-call if you can kill this guy post-flop, I don't because I multi-table, but be prepared for much confusion if you call and both of you hit.