[DC native]

I tried to dig something out of the depths of my brain before I posted, but I just can't remember the details, just a vague memory of reading something within the past few months about a Mexican researcher who also has a new and controversial theory about the origins of the first Americans.

[blam]

"...about a Mexican researcher who also has a new and controversial theory about the origins of the first Americans."

You may be thinking of Brazilian, Walter Neves. He has found a number of ancient 'Kennewick Man' looking skulls in South America.