I posted
this back in April which gives the American specialist opinion on treating Charlie.
We should keep in mind that America providing parents have money will do anything the parents would like to be done regardless of what is good for the child. In this case however, it sounds like this specialist is saying that Charlie's severe brain damage is irreversible at this stage of his illness.
I agree with Smudgie. If treatment is done at this stage on purely compassionate reasons (for the parents), taking Charlie's best interest out of their hands is tragic but probably necessary.