FergusMcDuck
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Thanks for this article! I didn't know about some of this.
Question for anyone who understands DNA: How did the DNA exclude other/external suspects if it was degraded/miniscule? Or is repeated testing the reason it's degraded? Or is it untrue that other suspects were excluded based on their DNA not matching?
It wasn't degraded or miniscule. There was enough for multiple tests that consumed a lot of it in the early days of DNA testing. I wrote about it here:
That comes from Kolar and what he claimed to learn from talking to LaBerge who did the final 13STR testing that identified enought markers to put the profile into CODIS. It does seem like Kolar misunderstood whatever LaBerge told him, because there had been multiple earlier tests of the DNA that had consumed plenty of it.
DQA1/polymarker test by CBI in Jan 1997 - minimum requirement 2 nanograms.
D1S80 test by CBI in jan 1997 and Cellmark in Feb 1997 - consumes between 0.5 and 40 nanograms (can be very wasteful)
13STR by CBI in Sep 1999 - the kits used consumed 1 to 2.5 nanograms
13STR by Denver Police Forensics Lab (LaBerge) in 2001 - again 1 to 2.5 nanograms
Basically, if LaBerge told Kolar there was 0.5 nanograms of unidentified male DNA, he had to have meant there was 0.5 nanograms remaining.