I am sure there might have had happened, but I strongly doubt it with the commander watching over the proceedings to assert their displeasure. I am sure the rare times it happened, the commander probably did a bit of shanking himself.

Would not be surprised if they "double-tapped" with the bodies being imspected and finished off with a unceremonious stab or throat cut to show mercy to a convulsing body, to then strip and dump it before moving on.

Just my uneducated guesswork ¯_(ツ)_/¯