Don't you need the victim to make a statement so charges can be filed though? I don't think a third party can have someone charged on another's behalf, can they?
I thought even for a civil case you need to first have a conviction in court.
Thats true in the US but not in Australia.
If the police feel that they have enough evidence for a conviction even if the victim doesn't want to press charges then they will. Its the police not the individual that makes that decision in Australia (as we are based on UK law).
IMO this is a much better position than the US where intimidation of the victim can mean charges are dropped and the individual cannot be prosecuted.
That doesn't mean that intimidation cannot occur in Australia, it sure can and it does make it harder to prosecute but for example, if Rioli and Bolton don't want to press charges but the police get hold of CCTV showing an assault they will make the decision on that evidence whether to press charges.