McCaffrey Busts

On a flop of [10c4s2s] Paul McCaffrey bets from the cut off and is raised by the button. McCaffrey calls and then checks the turn in the dark. The turn comes the [8d]. The button goes all-in and McCaffrey calls for his last few thousand and shows K-10, but the button shows 10-8 for two pair. The river is a blank and Paul McCaffrey is eliminated.