But I Have Trip Aces!

[StellarWind]

Put yourself in his shoes. Did you make your trips perfectly clear on the turn? I think you did and I think he is a good enough player to get it. Any Villain hand that loses to an ace should be in crying call mode right now. Therefore when he comes back with a river bet I'm crying. A sensible player is looking at Villain's hand and he says I'm beat. I'll call because this may be a trick or I may have a chop, but raising isn't on my radar screen.

PS: That scream you hear is your kicker dying. That plus the KK angle makes this quite a bad river card for you. Another reason why you should be pulling back, not raising.