There is video of one of the killings that took place. The video starts about 36:30 into the 4 Corners ‘Killing Fields’ report.
It shows a trooper shooting a civilian. The civilian was unarmed, compliant, on his back on the ground. The trooper asks several times if he should ‘drop the ****?’ Then shoots him.
On the available video evidence it looks like murder. There may be other evidence but there appears to be a case to answer.
A still from the video is shown at the start of this article.
https://www.abc.net.au/news/2020-11-18/igadfinquiry-into-special-forces-in-afghanistan-is-over/12816626