That's were I saw the window as well....
Leaves me scratching my head - I understood the 29 well placed (I'm sure it was 1 short of a mag change supposedly) rounds from a 223Rem Rifle..... which were all 'well placed' with devastating results....
Yet the image of the window says to me, there is a clear projectile hole at the top, possibly other(s) to the right of it, then the larger round break suggests another projectile/s possibly toward the centre of that pattern???
The report is the shooter pivoting and firing from the hip (from the scoped rifle)...
Standing and firing repeatedly into the one target? , with the projectiles all finding that window pane......i dont know....maybe it was a ricochet of a fragmented projectile....
The outside of the BAC is shown after 12min mark.
Had I have said it was the broken window at PA, the response would have been "oh, that was an AR15, 223Rem, shot from the hip, by a lefty, shooting right.....