The pharmacist who the defense is arguing is the murderer gave 2 buccal swabs, and 2 different analysts tested the buccal swabs independently of each other and both excluded him as being the contributor to the PMH sample from the crime scene, the unknown male(PMH is a mixed profile, the DNA mixture was only on one loci so a tiny bit of DNA was recorded that was different to the other profile in the mix)
all buccal swabs were tested to see if they were a match to PMH, any male it seems who they came into contact with during the investigation, when the pharmacist DNA was tested LE nor the lab knew who the PMH swab from crime scene belonged too, it was only when they found a match to the defendant in April 2018
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the analyst wrote her report on the match from PMH crime scene to IM blood vials from his prior DUI blood draw on April 6 2018 very difficult for the defense to climb that mountain (the buccal swab testing was done from 2015 up to 2018, when they got the hit on the defendant,)
the defendant is the only contributor to the sample they have matched to PMH, but boy did they have to do some testing before they got to him