First Joe sorry, about bad language I was having one of mine drunken rants.
As for John Kirby I'm sure he knows what he talking about and he knows stuff, but that doesn't make him less of a warmonger, war hawk as he is. For some reason guy is absolutely arrogant to me. As for his function I think he is primarily spokesman of military industrial complex, then everything else.
As for story of Russians killing retreating soldiers that's old cold war propaganda used shortly after WW2 ended. I'm not saying that is not true, but way it's presented is kind of slimy. Everything in that text could be also said for Ukrainians. But you can't hear that on western media. Only "Brave Ukrainians", "Fighting like lions for their motherland" Etc.
Also I think that penalty for desertion in war time in many countries is still death by firing squad. Well not in Russia, so if someone really doing that he can be charged. I know Wagner had that practice.