Can't we take her word for it?

For nearly an hour, Public Defender Daniel Lewan has peppered expert Roshale Gaytmenn with questions, challenging the process of DNA analysis itself.

From boiling points to bleach to polymers, he has painstakingly dissected every element of DNA testing. An ironic twist, considering that many defense lawyers have actually used DNA testing to exonerate those convicted before the technology was available.

Lewan has raised an interesting point about combined fluids, however. Though Gaytmenn had testified that Couey's semen was found mixed with Jessica's blood, she admitted that she could not state for sure whether those stains were deposited at the same time.

So if "one stain was left there today and a week from now another stain was deposited on top of it you're still calling it a mixture," Lewan clarified. Gaytmenn answered in the affirmative.

-- Elena Lesley