You might want to go back to Hockey 101. It wasn't offsides. The Gopher player clearly was in the zone before the puck, but the Sioux player was the one who knocked the puck back into his zone. Anyone who is educated about hockey would understand this is not an offside violation!
From the NCAA Ice Hockey Rules Book:
Preceding Puck into Attacking Zone
SECTION 38. a. Players of an attacking team must not precede the puck
into the attacking zone. For violation of this rule, the play shall be stopped
and the puck faced off in the neutral zone at the face-off spot nearest the
attacking zone of the offending team, if the puck was “carried” offside.
The face-off shall be at the origin of the pass, if passed offside.
A player in full control of the puck who crosses the blue line ahead of the
puck shall not be considered offside.
b. If the puck is intercepted cleanly by a member of the defending team
and is carried or passed by the player’s team into the neutral zone, the
offside shall be ignored and play permitted to continue, even if a member
of the attacking team has preceded the puck into the attacking zone.
(Officials shall carry out this rule by means of the slow whistle.)
c. If a player legally carries or passes the puck back into his or her own
defending zone while a player of the opposing team is in that defending
zone, the offside shall be ignored and play permitted to continue.
That said you could probably argue whether or not the Siox player had complete control of the puck.