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PCAST report • DNA mixture limits 3 contributors 20% fraction

Published byAron Maxwell Modified over 5 years ago

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Presentation on theme: "PCAST report • DNA mixture limits 3 contributors 20% fraction"— Presentation transcript:

1 PCAST report • DNA mixture limits 3 contributors 20% fraction
• Bitemark • Firearm • Footwear • Hair Cybergenetics ©

2 Transparency in DNA Evidence
President’s Council of Advisors on Science and Technology November, 2016 Washington, DC Mark W Perlin, PhD, MD, PhD Cybergenetics, Pittsburgh, PA Cybergenetics © Cybergenetics ©

3 Pattern evidence A B item item data data computing comparison type

4 DNA mixtures eye of newt toe of frog Double toil & trouble

5 TrueAllele solution Unmix the mixture eye of newt toe of frog type
Data: use everything, add nothing Objective: never consider suspect reference General: same for investigative & evidentiary

6 Validation studies

7 Linear relationship

8 Inclusion probability
2005 NIST study When not “inconclusive”: 213 trillion (14) 31 thousand (4) Cybergenetics ©

9 Government failure

10 Random counting

11 Peer review

12 Justice April 25, 2016

13 Transparency • open crime lab data to outside scrutiny
• open CODIS database to everyone • DNA mixtures solved ten years ago • no more money for failed government • replace bad government with good science

14 PCAST agenda Wasteful NIST validation study
Impact on justice & injustice • Give NIST & FBI tens of millions of dollars • Concentrate forensic power at NIST • Delegitimize established forensic science • Undermine reliable DNA evidence In Indiana: Forest, Wade, Pinkins In Washington: the problem is the solution

15 Arbitrary nonscientific limits
DNA mixture limits 3 contributors 20% fraction ? NIST recommended limits to PCAST NIST benefits financially from limits NIST benefits politically from limits • Conflict with Daubert factors: testing, error rate, peer-review & general acceptance • Disconnected from papers cited by PCAST • Jeopardize every DNA crime lab process • If best DNA goes, all forensic evidence goes

16 What you can do • Criminal justice • Public safety • Government waste
Meet the new boss

17 TrueAllele YouTube channel
Learn more • Courses • Newsletters • Newsroom • Presentations • Publications • Webinars TrueAllele YouTube channel

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