"There are clean samples and there is a clean DNA profile"
I took that they have clean samples to share if needed and that they have a clean 13 marker DNA profile"
The source above is not they only one I ran across. I have heard it on TV also, but then I have heard opposite also.
I chose to believe that they do have a full 13 marker DNA profile and enough samples to share now due new technology needing less of a sample to get a full 13 marker DNA profile from.