St. Bonaventure (12-8, 2-4 Atlantic 10) led 81-80 after Charlon Kloof sank two free throws. Colter rebounded a missed free throw with 4 seconds to play and drained the game-winner at the other end.
Marquise Simmons broke a 23-23 tie with a layup to put St. Bonaventure ahead and the Bonnies led 44-38 at halftime.
Colter's 3 pointer put Duquesne up 55-53 at 15:31 in the second half, and the lead traded hands four times until Matthew Wright hit a 3-pointer with 47 seconds left, giving the Bonnies a 79-78 edge. Soko hit a pair of free throws to make it 80-79 with 21 seconds left, then he fouled Kloof.
Kloof finished with 23 and Wright 22.
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