Thomas bodied him. It could have been a foul or a no-call, but that contact occurred before the alleged charge. I think that Craft was there, but it is debatable whether or not he was in the restricted area [his foot obviously wasn't down, but if it is a vertical "cylinder" from the area, then he might have been over it.
I don't see it as a giant conspiracy / OSU cheating their way to a win, but it was an impactful call that easily could have gone the other way. If that basket counts, I think ISU would have beaten them. But you have to credit Craft for making those plays--not just drawing the charge, but also scoring the next possession and then drilling the onions three to win it as time expired.