Being Threatened at Work

[TLO]

I need some advice here.

The other night at my workplace, I was involved in a verbal argument with a co-worker, (with my co-worker doing most of the yelling). He had an issue with the way I was doing something at work, and absolutely laid into me with a verbal assault laced with profanity.

I tried my best to ignore him, but he kept at it. Finally I turned around from my work, and told him to "shut the **** up". He got in my face, and said "this isn't over- we'll finish this in the parking lot after work".

Keep in mind I am about half his age, half his size, and he's the one yelling about how we will finish this after work. (Seems a little childish to me.) He stayed in my face for a minute or two yelling profanity, with no supervisors or any other co-workers stepping in to stop him.

I felt threatened enough that I left work, and even made a police report about the incident. (I want my bases covered in-case he ever does anything physical) The officer went into my work and warned the employee, and basically told him to back off, and that if he kept it up I could indeed press charges.

What is my next step here? I am trying to cover my ass because this worthless get me by job is just a temporary thing until I start my career. Is there any other actions I should take?