From what I've read, murder charges would have to show compelling evidence that the accused actively participated in the crime. There are lesser "aiding and abetting" charges that can be applied otherwise.
I am most interested in charges against Pentagon officials. The Pentagon took direct control of the national guard after the BLM situation in DC over the summer. It is their duty to refuse illegal orders, even if those orders come directly from Donald Trump. The entire strategic conceptual model the military follows fell apart when the capitol was stormed. It is an ancient model, with the government in the middle, surrounded by infrastructure, culture, population, etc, in concentruc circles.
If we allow that model to be violated for partisans, the pentagon is not fit for purpose. The democratic party will be forced to put the pentagon in their sights in ways that we have not seen since the 1970s, and the pentagon can not afford that right now, at a time when we are involved in little cabinet wars all over the world. This path ends with every service member being called baby killer in every urban center of the country, and it spreads from there.
A lot of generals have taken issue with civilian control of the military, but in the end, it is done this way for the benefit of the military. A standing army that has become an existential threat to one party or the other can not stand.
That is why we need to send generals to leavenworth for this. It is a question of national security.
I'm not hopeful that Biden and his demicratic parry will do this, though. I think they will fecklessly 'move forward', until serious, open, partisan conflict with the military is the only possible path forward.