[Nogbad]

And the existence of genetic variation among the samples
almost certainly would eliminate the idea that somebody simply stole a sample,
doled it out into the envelopes, and mailed them out.

I think that possibility was discounted by serious people months ago.
As I have previously argued, genetic analysis is not necessary to establish that.

[Mitchell]

I agree, but more evidence pointing in the same direction is helpful in confirming that one is on the right track.