RE: Another unfortunate a
During the Gulf War, 25% of all American casualties were friendly fire.
That said, with Costall, he wasn't "murdered" as the National Post is making it out to be. The criminal aspect relates to "negligence", something they clearly DON'T mention. Friendly fire, or as we in the Forces call it, "fratricide", because Murphys Law states "friendly fire; isn't", goes hand in hand with criminal negligence.
With regard to the Americans, he wasn't killed by a U.S. soldier., as they wouldn't be intermingled with members of the PPCLI. Being a light machine-gunner, his role was to supress the enemy. Therefore one can deduce he was most likely killed in one of two ways. First, he may have been in a dug-in (trench/fox hole) or a slightly dug-in postion (shell scrape). If that was the case, elements of the reserve component coming up from the rear may have "gone to ground" behind his LMG position and just by chance he was peppered. The 2nd, and more plausible scenario, is that Costall was moving positions, or "taking a bound" as it's termed. This could have been part of a section attack, or simply him, under his own initiative, relocating his base of fire. In that case, he could have either been shot by an errant round, or intentionally shot by a jittery member of his company seeing him "sky-lined" by the explosions. Regardless of scenario, Costall is dead, sadly, and it is highly unlikely anyone will ever be confirmed as the person who put the rounds in to him.