Wow so I got threatened at work, customer came in screaming and cussing at everyone. Then he called…

Wow so I got threatened at work, customer came in screaming and cussing at everyone. Then he called me a "stupid fucking (n word)" and said he knew where I lived and that he was going to come back to where I worked and kill me. I had to lock the door and leave it locked all night and just let customers come in as they showed up...