Starchild, a child from another planet

The Story starts in Mexico, where an American researchers stumbles upon a grave. Here lie the skeletons of a female and child. The female skeleton seems ordinary, but the childs skull is looking very strange.

The child's skull looks exactly like the populair image of an alien. Large head, but very small cheekbones and chin. Look at the video provided here:

After DNA tests, it appeared the mother was human... but the father wasnt... Researchers said it was impossible. But now the question remains, was this child a half-breed, between a human and an alien? Or did the child have some weird symatrical bone disease? 

Yours to decide.