The father has dropped the charges against Rebecca here
I think that is further proof, for me, that the dad is an eminently sensible individual who puts his son's needs first. I agree with him that the best thing to do, for the boy, is to draw a line under it.
I'm not sure whether that means the son stays with the father. I imagine that's not the end of it, but I think if I were him I would want to get on with some decent contact for the boy, looking towards the future.