That is not really accurate. ISU was not down 15 "late in the game".
They were down 43-28 with 15:10 left in the game. They then went on a 22-2 run to make it 50-45. The game was tied at the 7:45 mark and ISU finished it 22-2 run at the 6:15 mark. It was back and forth from there.
In regards to the end of the game situation- it seemed pretty bad to me..
I have seen discussions/arguments on redbirdfan, valleytalk, and msubearnation about it. Someone with MSU said they were at the scorers table and saw the 4th official check the video and ruled it was good. If that is the case, something is really wrong. Someone else said they were in the production room and saw that it was good as well. However, both ISU and MSU's radio guys said the 3 officials on the court never once looked at a monitor and there was not one to even look at.
I am really glad it didn't matter in the long run, but it appeared from my POV online- that it was NOT good... there were also several posters on MSU's board that didn't think it was going to count either...