You need to understand the situation and understand that there's no such thing as verbal assault. You can tell her anything you want. offensive or not and the police can't do anything because it's not a crime to insult people. if you follow her around insulting her then that's harassment. If you told her that you were gonna do something to her then that's threatening. If you told her you hope she's dead and she should stick a broom up her @ss, then that's an insult. Harassment and threatening can get the police involved. Insulting can't or if they police is involved they would only ask you to calm down as no charges can be laid.
The manager can fire you or do something related to your work, though.
I know this because a roommate was very racist and offensive towards me. I called the police a few times and they kept telling me the same. It's not a crime to insult people and there's no physical contact. After that, I tell people to F off all the time without worrying about any consequences.
