I don't really understand what these 8 could be charged with in relation to Kaylee's injuries, or really for any of the fighting that was happening around KG and MD, as far as I am aware nobody else sustained any injuries that day, and they were just kids being stupid and getting caught up in the drama surrounding the two groups.
I am wondering if some people's confusion comes from not having watched the video and just relying on other peoples descriptions of the incident. It would be easy to assume that KG was jumped and attacked by an out of control gang just going off posts and news articles because it seems that the fact that both girls appear to have been at an arranged showdown has been lost due to Kaylee's serious condition and MG's loss of control, which is understandable, but I think that unless someone has watched the video with their own eyes, they can only guess at what happened, or perceive a version that's not based entirely on facts and comes with a person's own natural bias.
As others have stated, having actually watched the video, I personally don't think anyone other than MD would be facing charges relating to Kaylee's injuries.
It's difficult have a healthy discussion if you aren't basing your opinion on all the known facts. For me, those facts are that nobody touched Kaylee apart from MD, nobody appeared to incite MD towards violence, in fact I heard someone say "get her Kaylee", and I also didn't see MD engage in Amy other fighting, she appeared to be trying to breakup the other scuffles.
Based on having watched the video, both the longer version and the slowed down version, it is my opinion that both girls went there expecting to fight, neither expecting it to go down how it did, and it all went terribly wrong.
Kaylee did not deserve what happened to her, and regardless of the reason it may have happened, MD lost control and she should have to face the consequences, I do believe that MD is the only one who will be charged.
JMO