Was Charlie's Shooting As Reported?

I was curios to see if it was possible for Charlie Kirk's shooter to act alone and do the things the news reported, so I did some amateur investigations, since I have the means to do it. I also show the body armor angle, and explain if it were possible to have a different outcome, if Charlie was wearing a different type of body armor. My prayers go out to Charlie's family, and I hope this somehow helps someone.