Please don't apologise Tracy sweetheart, no need whatsoever
What a terrible dreadful shock it must have been for you all, what the H**L went through his mind when he did that???
Is the car in your name Tracy, is he on the insurance? If it's in your name and you (obviously) didn't give him permission to take it I think you can call the police. I'm not sure if it would be a 'domestic' or not though?
big hugs all round for you and the children