I maybe of some help.
Back in February, I submitted a match to the LSU Faces lab for UP6942 and Phylis Marie Corbin. I ended up getting an email from Dr. Allaire from the LSU Faces lab and spoke to her over the phone. Indeed, UP6942 had been tested 3 times prior in order to get solid DNA. These attempts were unsuccessful. The remains themselves were cremated in 1996ish. The LSU Faces lab however was planning to try again either this year or next year to extract DNA from the mouth or aka mandible, According to Dr. Allaire, the LSU Faces lab could NOT rule out Phyllis Marie Corbin. The only exclusion was Mary Shinn based upon Dentals which Phyllis does not have.
It is my opinion, that the Old Metaire Jane Doe and UP6942 are one in the same. I have tried several times since to get ahold of Dr. Allaire but have been unsuccessful. It might be worth a call though to verify that they are one in the same.