The Star Child, the skull of a supposed “alien” child, does seem to have anomalous DNA on the father’s side of the family.
Lloyd Pye explains:
Proof of genetic engineering 900 years ago?
The more time goes on and empirical evidence such as DNA from the Star Child, and I’m sure others will crop up eventually, will have to be accepted by mainstream science. Then the idea of aliens on Earth won’t be so much tin-foil.
But in my opinion, these aliens seem to be “of Earth” despite the fact the DNA isn’t in the world’s database.