Wayde Mills report

Can anyone explain to me how you can be found guilty for striking an "unknown" Woodville-West Torrens player?
Was at the game although didn't see this incident. Still, how can the League make a charge stick if they don't know who he hit? Anyone see it?
Was at the game although didn't see this incident. Still, how can the League make a charge stick if they don't know who he hit? Anyone see it?