@UnapologeticallyAspie I'm answering something you asked in a different thread because it's on topic here and potentially off topic over there.
Investigators would be able to tell if the DNA they have is human or not.
I've never heard Delphi investigators give any indication that the unmatched DNA they have is not human. For example, they have talked about taking DNA samples from other humans to presumably compare to it. If they knew it wasn't human, there would not be any point in doing that. They may have both human and non-human DNA to work with and that would actually be quite typical for any crime scene as many people have pet DNA on them. For example, we know that Libby was playing with a relative's puppies a day or two before and Abby had a cat at home. MOO
Investigators would be able to tell if the DNA they have is human or not.
I've never heard Delphi investigators give any indication that the unmatched DNA they have is not human. For example, they have talked about taking DNA samples from other humans to presumably compare to it. If they knew it wasn't human, there would not be any point in doing that. They may have both human and non-human DNA to work with and that would actually be quite typical for any crime scene as many people have pet DNA on them. For example, we know that Libby was playing with a relative's puppies a day or two before and Abby had a cat at home. MOO