What to do about false rape allegations?

Last night my friend got kicked out of a club in Australia after being falsely accused of raping someone in the club. The security guards kicked him out because he “made someone feel uncomfortable”. When he was outside he was assaulted by multiple men saying he raped somebody. They choked him, threw him around. Security and staff just watched it happen. On his way back to his car he got assaulted more, and they chased after him once he was inside his car and he had lock his doors as he drove away.

A couple of weeks prior he was kicked out because of being falsely accused of spiking drinks (video camera evidence proved him not guilty and was cleared of his ban). Security recognised him when he came in and said “sorry about last time man”.

He has been going to that club for years, and it was all people who he didn’t recognise. He’s traumatised obviously. I have told him to go to the police to see what he can do, but I’m not sure what he can do about it.