His family and friends seem to agree the shooter was the one being beaten. One person noted that Simpkins sleeves to his hooodie seem tied closed or tied together, making him unable to fight back. Watching video again and again it does kinda appear that way. Anyway, long FB post from his cousin with video.
https://www.facebook.com/Cint75/posts/4688652617831947
If you happen to find that video somewhere besides FB ( which is requiring sign-in, which I will never sign up for ), I'd appreciate it. Twitter does not have that video yet.