Early Hominid and Homo remains (fossils) are plentiful around the world.
There is no theory that any Homos originated in No America. Walking here is no mean feat (no pun indended). Walking away is just as difficult.
Still, an interesting idea that we had our own primitive types in So Cal 135,000 years ago. Some might even say they never left, and now run the CA state government.
Walking is how the Indians were supposed to have gotten here in the first place, so that's not a very convincing argument against.
LOL! If that's the case, I'd say the idea of "the survival of the fittest" has been dealt its death blow....