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When DNA alone is not enough: exoneration by computer interpretation

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Presentation on theme: "When DNA alone is not enough: exoneration by computer interpretation"— Presentation transcript:

1 When DNA alone is not enough: exoneration by computer interpretation
American Academy of Forensic Sciences Jurisprudence Section February, 2017 New Orleans, LA Mark W Perlin, PhD, MD, PhD Cybergenetics, Pittsburgh, PA Professor Fran Watson, JD Wrongful Conviction Clinic Indiana University McKinney Law School Greg Hampikian, PhD Boise State University Boise, Idaho Cybergenetics © Cybergenetics ©

2 Human Faces of Wrongful Conviction

3

4 Darryl Pinkins and Roosevelt Glenn and Probabilistic DNA Genotyping
Time Line DNA 1989 Crime Convictions Appeals WCC Dr. Greg Hampikian Dr. Mark Perlin & Cybergenetics 48 Hours Freedom

5 Crime of December 7, 1989 Five Attackers

6 January 2, 1990 Arrests at Luria Brothers
Darryl Pinkins Roosevelt Glenn William Durden Barry Jackson Gary Daniels

7 August 16, 1990 Cellmark Analysis
The DNA detected from the stains labelled seminal stains on the jacket and the material cutting from the sweater did not originate from any of the following individuals: William Durden Jr., Darryl Pinkins, Barry Jackson, Gary Daniels, or Roosevelt Glenn.

8 August 16, 1990 Cellmark Analysis
The DNA banding pattern identified in the seminal stains on jacket 3-3 and 3-4 that could not be attributed to the victim were similar in both of those pieces of evidence. Additionally, this DNA banding pattern was similar to one of the two non-victim DNA banding patterns identified in the seminal stain on jacket 3-1 and seminal stain on sweater #10.

9 October 26, 1990 Amended Charges
Charges against Barry Jackson and Gary Daniels dismissed based on theory that DNA analysis revealed victim and “two unknowns.”

10 Conviction and Appeals of Pinkins
Guilty on May 3, 1991 Sentenced June 14, 1991, to 65 years Pursued Davis/Hatton June 29, 1992 PCR for newly discovered December 16, 1992 IU McKinney contacted August 18, 1999 DNA Testing Report Nov. 5, 2001: ‘Same’ Results PCR Denied by Trial Court November 19, 2002 Indiana appeal denied March 5, 2004 Federal appeal denied February 8, 2007 Petition to File Successor June 1, 2015 Released April 25, 2016

11 Conviction and Appeals of Glenn
Jury trial January 13, 1992 deadlocked Jury trial March 1, 1993 convicted one of three counts Sentenced April 22, 1993, 36 years Direct appeal August 29, 1995 PCR filed November 14, 2003 Trial Court Findings June 24, 2008, Denied Relief Indiana Court of Appeals decision April 22, 2009 Glenn Released From Parole November, 2010 Federal trial court habeas denied August 3, 2011 Petition to File Successor June 1, 2016 Conviction Vacated and Charges Dismissed January 30, 2017

12 Key Successor Issues Legal Claims
Newly Discovered Evidence via TrueAllele® Ineffective Assistance Brady Violation Factual Claims TrueAllele® Identifies Five Unknowns Use of Serology Inclusion in Face of DNA Exclusion Faulty Hair Comparison Snitch Testimony Suspect Faulty Identification

13 April 25, 2016

14 into sperm and nonsperm
#1. Jacket evidence Lab separates DNA into sperm and nonsperm major J sperm mixture minor nonsperm (victim V)

15 Match table 1 References V Pinkins J -15.39 -18.00

16 into sperm and nonsperm
#2. Sweater evidence Lab separates DNA into sperm and nonsperm major S sperm mixture minor nonsperm fraction (victim)

17 Match table 2 References V P J -15.39 -18.00 S -15.17

18 #3. Hair evidence Roosevelt Glenn case DNA analysis H

19 Match table 3 References V P Glenn J -15.39 -18.00 S -15.17 H

20 Different evidence genotypes?
Evidence vs. evidence Different evidence genotypes? J S H 11.07 1.21 4.15 10.22 -2.39 10.31

21 Similar genotypes Jacket Sweater Hair

22 Kinship analysis father mother person sibling

23 XY male genotype, so three brothers
Sibling vs. evidence sibling of J S H 6.67 4.85 5.08 4.70 6.01 3.34 5.78 4.18 5.55 XY male genotype, so three brothers

24 Match table 3 References V P G J S H -15.39 -18.00 11.07 1.21 4.15 -15.17 10.22 -2.39 10.31

25 Examine multiple experiments simultaneously
#4. Joint jacket 10% minor Examine multiple experiments simultaneously

26 Match table 4 References V P G J S H JJ -15.39 -18.00 11.07 1.21 4.15
-6.19 -15.17 10.22 -2.39 -5.81 10.31 -3.52 -2.78 -8.50 -8.43 7.05

27 #5. Jacket + sweater joint 5% minor
Locus D5S818 JJ JS

28 Match table 5 References V P G J S H JJ JS -15.39 -18.00 11.07 1.21
4.15 -6.19 -7.66 -15.17 10.22 -2.39 -5.81 -8.09 10.31 -3.52 -5.80 -2.78 -8.50 -8.43 7.05 -1.49 -10.47 -5.79 -12.60 8.06

29 TrueAllele Pinkins findings
1. compared evidence with evidence 2. calculated exclusionary match statistics 3. revealed 5% minor mixture contributor 4. jointly analyzed DNA mixture data 5. showed three perpetrators were brothers Found five unidentified genotypes Defendants not linked to the crime Computer transcended human analysis

30 Moving forward Computer reanalysis of DNA data proved Pinkins innocence • Exculpatory DNA evidence was available fifteen years ago • Old 20th century human review couldn’t deliver information • New 21st century computer analysis overcame limitations • Failed interpretation cost Pinkins 15 extra years in prison • Thousands of cases with misinterpreted or “inconclusive” DNA • Other innocents wrongfully imprisoned by old DNA methods • Revisit “inconclusive” cases with new computer interpretation • Re-examine old forensic data for new exculpatory evidence Get pro bono DNA help – better science for better justice

31 TrueAllele YouTube channel
More information • Courses • Newsletters • Newsroom • Presentations • Publications • Webinars TrueAllele YouTube channel

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