There was a big school shooting in Connecticut about 12 years ago.
It was supposed to be about December 20 but the video shown had leaves still on the trees.
And using Google earth, anyone could look down on the supposed school and see there was different parking lanes and air conditioning units etc etc. Then if you Google earth viewed a different school close by, less than a mile, you could see the video was from that school.
So the "live footage" showman that day was from a drill held two months before.
This is a fact and I Google earthed it myself.