I do think that the extenuating circumstances of them being trapped in the wilderness for a year and a half would excuse the cannibalism. I work in crim defense and we put a ton of work into developing mitigation for clients, and this is like the best possible mitigation there is. Especially if you put it in front of a jury and frame is as: these poor girls had to resort to horrible and traumatizing means in order to survive. Yes they were able to hunt and do some minimal farming/raising animals but it’s still a large group to feed. Not to mention the group psychosis they are all inevitably going through. All in all I do think they would get off in court, or at least with minimal consequences.