That find was very controversial. The skulls in question have some features similar to modern Europeans. They don't quite fit in the existing theories, so they have been rejected and hidden.
Just like the evidence that there were Polynesians in South America.
Who Were The Si-Te-Cah Lovelock, Nevada, is about eighty miles northeast of Reno. It was in a cave near here, in 1911, that guano miners found mummies, bones, and artifacts buried under four feet of bat excrement. The desiccated bodies belonged to a very tall people - with red hair.
Spirit Cave Man
