Force play slide + a balk

[Bob Lyle]

This was posted on another site but did not get a conclusive result. Do we want to take a stab at it here?

Situation: NCAA rules

R1, 2 outs,

Runner is going and a balk is called. Pitch is delivered. Sharp grounder to short who flips to second and the runner is called safe but he completely and illegally takes out the second baseman. It was a gross violation of the force play slide rule and the umpires correctly called it.

20 minutes later after the ambulance carted the second baseman off of the field, what should the umpires do besides ejecting R1 which they did?