My teen son tells me every day he wants to kill me and even describes how he will

Hmmm... terrible. Your son is very naughty and rude. There are some things that may need attention:
1. if he's getting enough attention?
2. with whom he had been friends?
3. have you take him to a psychologist?
If some of the above questions answered, we will know the root of the problems he experienced. Thanks..

That's pretty terrifying. suhari makes some good points. I'd say the most important is the psychologist. Get him to a psychologist asap. I don't want to scare you anymore than you probably already are, but there are kids who have threatened to kill their parents and then gone through with it. Don't hesitate to get him help.