The governor is a highly respected experienced government leader and most likely apologized because of the realization that this was being misreported and blown out of proportion to what really occurred. This family held a "meeting" and assigned the sister to drum up media attention for the purpose of MEDIA ATTENTION. They set out to provide information that was a lie-- as has been admitted to by both girls now. She/they lied about what she said to the governor, lied about what happened with the principal, lied in interviews about it, etc.
There is NO evidence that the supposed "mean" tweets are from any student at her school, or anyone even in the area at all. Interesting that she is now implying that others freedom of speech should be restricted from criticizing HER.
jmo