Nope, that's an urban legend, my friends cousion was one of the
hostages. The action all happened within moments, all he heard was
"get down! get down!" and saw a few flashes, then it was over. No
drag to the toliet and kill. One tango did try to drag a woman as a
shield but another person pulled her out of the way giving the CTs
a clear shot.
Anyway, a terrorist is worth a lot more alive to us then dead, he
is a valuable source of intelligence and killing him just to send
out a message makes little sense.
Your story while fun to read, makes no sense.