Gullwing

I am not one of the people involved in this.
Say you have a friend that went to an apartment of acquaintance from work for a birthday party for a few minutes to say hi. Several hour later she come home soaking wet. She tells you had her cell phone broken so she couldn’t call the police and she was locked in the bathroom. A guy she worked with (dish washer from Moldova) beat her, raped her and then threw her in the show to wash away evidence before forcing her outside and throwing her keys into the middle of the street.
You take her to the hospital for a rape kit, which collects plenty of evidence including DNA. The police come and take a statement.
The police then take to the rapist and he tells them he knows nothing. The several witnesses say the girl was drunk (she wasn’t) and they did not see what happened. While taking the statement the police find a warrant out for the girl from three and a half years ago. (Police sent notice to wrong address and had it listed under incorrect name, people involved reconciled and moved on, but police will not drop it). Four months later nothing has been done, police say it is a he said she said and could just be “rough sex”. Several days from now the rapist will be getting on a plane to fly back to Moldova forever.
Over the past four months the rapist still works at the same place as the victim, he will harass her all the time. Management will not reschedule either person so they do not have the same shift. He meets her after work at her car and rubs in the fact that he raped her and nothing will happen to him.
A friend was raped and the police refuse to do anything and the guy will be gone in a few days. What would you do???