I managed to get my xenonaut unconscious and when I checked my other xenonauts inventory while he was over the first one, there was two bodies instead of just one. Here is pic. Same happened with civilian. The bloody bodies were named as xenonaut corpse and human corpse, but after the mission was finished, there were no casualties. On later mission I killed one civilian with my hunters rocket and there were only one body. Other civilian lost consciousness in smoke by that blast and had two bodies. I shot him and he died and now there were three bodies, two of them were corpse. I shoot them some more, but there were no more bodies.
I usually respect the lives of game characters. This testing makes me complete monster