The IDF could not have killed her, for reasons I describe.
It ended up taking 33 minutes but I think that it explains everything as well as possible, without getting too caught in the weeds. There are plenty of problems with the AP and CNN reports but this covers the basic issue - the distance from the gun to Shireen and who could have physically been that exact distance. (I could have added ten minutes on the idiocy of the CNN quoted "expert" who happens to hate Israel.)
I hope it helps people understand the issues.
If you want only the Powerpoint slides, I placed them here (with embedded video). Requires a Microsoft account.
IMPORTANT UPDATE: More evidence here. The two people closest to Shireen said that snipers shot at them from buildings across from them. There were no IDF troops in those buildings - but there were Palestinian terrorists.
UPDATE 2: I am told that the Duvedian unit in Jenin uses the M4 Commando 5.56mm 11.5 30+1. The muzzle speed is somewhat lower than the longer M4 or M16. My estimate is that the distance based on the audio analysis would be longer than I said in the video, about 196 meters, still lower than the 215 meters distance the IDF was known to have been. (h't DigFind)