Thanks! It seems to me the enlarged eye sockets of the skull and the adult molars bring this into question....as far as hydrocephalus is concerned. Not saying it is not possible...
http://ancientstandard.com/2010/12/20/why-some-ancient-south-american-skulls-have-such-strange-shapes/
Unfortunately so many people really want to have some sort of alien or demonic (or some combination there of) answer, they completely dismiss the simplest and most logical answers.
Some example of cranial deformation bindings on skulls found in South America.
Here is a painting from the mid-1800s by an explorer (Paul Kane) who witnessed this still in practice.