The next step, after you have confronted your boss, is to take notes of what happens afterwards. Why are you doing this?
Well, not everything turns out roses. Sometimes you're just dealing with a jackass who is never going to turn into a human being. Therefore, you need to take notes on everything that has gone down.
These notes serve two purposes.
The one purpose is to get a profile of the boss. Have you ever watched "Criminal Minds?" Well, they profile the unsub (unknown subject) to get an idea of how is mind works so that they can get a better idea of who may be committing the crimes.
By putting together a profile, you can get a better idea of why your boss is behaving the way he is. One thing by itself may not give you a clear picture. But if you put everything together…you get a clear profile and will have a better idea of how to deal with this person.
The second purpose is, in case it gets this far, to have something to hand to the legal eagles who are going to handle your case SHOULD this go to court. You need to have everything documented.
That means dates, times, circumstances, any witnesses that may have been in the vicinity…anything that you can use to make a case against your boss.
Compiling a 30 page brief on abusive instances will go a long way towards making your case for you.