I came here to post this, too. It’s a little bit of hope.
From the linked article:
New technology in the DCI Crime Lab in Ankeny is now being utilized. In April, the DCI Crime Lab started using a software program called Starmix. Starmix can analyze and separate a mixture that contains several DNA profiles.
"In the past we couldn't see much about that minor component because it was too weak. It was kind of outnumbered by the major. The beautiful thing about Starmix is it can really separate out components of the two or three person mixtures, and help us compare that to the known samples," said Halverson. "So now we are able to say much more about a minor component of DNA in a mixture, which quite often really is the probative evidence or the really important part of the mixture that we need."