From an currently deployed field grade with access to the incident:

Got some updates on this and some points of clarification for those back in CONUS or those who haven't been here since the SOFA.:

1) The Soldiers in question are from a Civil Affairs unit.

2) They did not drink beer. They had a can of Monster energy drink.
As was stated before, I'm sure there's a hell of a 15-6 going on into that article.