Ex girlfriend threatened to harm my son?

The police aren't going to do anything until something bad happens! So the best thing for you to do, is DROP HER LIKE A HOT POTATO! Don't be calling her, don't accept her calls to you, she could very well have had some other man with her when you called and she could have reacted to that!! Just leave this situation alone and get on with your life!!! And DON"T be calling EX gf's in the middle of the night anymore! I would slap you too if I was woken up from a sound sleep!!!