Rule Interpretation

Sunday afternoon in the fourth, the second Pirate run scored as follows:

Jose singled.
Bill singled, Jose went to third.
Juan walked, loading the bases.
Jackson grounded into a fielder's choice; Jose scored; Bill was out at third (first out); Juan went to second
Dustin reached on an error; Juan went to third; Jackson went to second.
Leo struck out (second out).
Leo ran for Juan.
The order of the next play:

1.  Bobby then hit a ground ball to third.

2.  The third baseman threw wide to second.

3.  Leo crossed home plate.

4.  Dustin was tagged out before reaching the second base bag.

5.  The umpire ruled the run counted.

Charlie was sure the run should not count, that although the runner was tagged out, that it was still a force play because Dustin was no longer entitled to first base when Bobby became a base runner.  Someone in the dugout, whose name shall be changed to protect the innocent, was equally sure that a tag out was not a force out.

I, not to be confused with the person whose name was changed, e-mailed the NCAA Baseball Rules Secretary.  His response is: Force play for the third out. No run can score. 

The person whose name was changed, not to be confused with me, was wrong, Charlie was right, Charlie was silent, and the PIRATES WIN.