As I said, had there been an out of bounds call, they could review to determine whole the ball went off of, or (in this case) had they ruled that both players stepped out of bounds, they could review to see who stepped out first. Since there was no call, hence no violation, they can't review to determine if there was a violation.
http://www.ncaapublications.com/productdownloads/BR17.pdf
Rule 11 covers Instant Replay. Sect 1, Article 4 states -
The officials shall not use such available equipment for judgment
calls such as:
a: Determine whether a foul occurred (Exceptions: A flagrant 2 foul.)
b: Determine whether basket interference or goaltending occurred
c: Determine whether a violation occurred except in 11-2.1.e and 11-3.1.a.2.
11-2.1.e states -
Violations.
In the last two minutes of the second period and any extra period(s), to determine which team caused the ball to go out of bounds when there is a deflection involving two or more players. In the case of last night's game, there was no out of bounds call and no deflection.
11-3.1.a.2 covers shot clock violations, which doesn't apply.
The Gopher stepping on the baseline is not reviewable per Rule 11-1.4.c.