Wrongful Convictions and Forensic Science: the Need to Regulate Crime Labs
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Case Western Reserve University School of Law Scholarly Commons Faculty Publications 2006 Wrongful Convictions and Forensic Science: The Need to Regulate Crime Labs Paul C. Giannelli Case Western University School of Law, [email protected] Follow this and additional works at: https://scholarlycommons.law.case.edu/faculty_publications Part of the Evidence Commons Repository Citation Giannelli, Paul C., "Wrongful Convictions and Forensic Science: The Need to Regulate Crime Labs" (2006). Faculty Publications. 149. https://scholarlycommons.law.case.edu/faculty_publications/149 This Article is brought to you for free and open access by Case Western Reserve University School of Law Scholarly Commons. It has been accepted for inclusion in Faculty Publications by an authorized administrator of Case Western Reserve University School of Law Scholarly Commons. GIANNELLI.PTD 12/17/2007 2:47:57 PM WRONGFUL CONVICTIONS AND FORENSIC SCIENCE: THE NEED TO REGULATE CRIME LABS* PAUL C. GIANNELLI** DNA testing has exonerated over 200 convicts, some of whom were on death row. Studies show that a substantial number of these miscarriages of justice involved scientific fraud or junk science. This Article documents the failures of crime labs and some forensic techniques, such as microscopic hair comparison and bullet lead analysis. Some cases involved incompetence and sloppy procedures, while others entailed deceit, but the extent of the derelictions—the number of episodes and the duration of some of the abuses, covering decades in several instances—demonstrates that the problems are systemic. Paradoxically, the most scientifically sound procedure—DNA analysis—is the most extensively regulated, while many forensic techniques with questionable scientific pedigrees go completely unregulated. The regulation of DNA profiling, which has developed gradually over the last twenty years, can serve as a model for other laboratory units. The accreditation of crime laboratories, the certification of examiners, and the standardization and promulgation of written protocols for each technique would go a long way in professionalizing forensic science. In addition, quality assurance programs, including proficiency testing and external audits, should be mandated. Finally, forensic science commissions should be established in every jurisdiction to implement these and other reforms. INTRODUCTION .......................................................................................165 I. CRIME LAB FAILURES.................................................................172 A. West Virginia..........................................................................172 B. Oklahoma City.......................................................................174 1. Curtis McCarty Prosecution...........................................174 2. Jeffrey Pierce Prosecution..............................................176 * Copyright © 2007 by Paul C. Giannelli. ** Albert J. Weatherhead III & Richard W. Weatherhead Professor, Case Western Reserve University. I would like to thank Brandon Garrett for his helpful comments on an earlier draft of this Article. Electronic copy available at: http://ssrn.com/abstract=1083735 GIANNELLI.FPP 12/17/2007 2:47:57 PM 164 NORTH CAROLINA LAW REVIEW [Vol. 86 3. Alfred Mitchell Prosecution...........................................178 4. Malcolm Rent Johnson Prosecution .............................179 5. Additional Cases.............................................................180 6. Other Problems...............................................................180 C. Montana..................................................................................182 D. Chicago...................................................................................185 E. Houston ..................................................................................187 F. Virginia ...................................................................................192 G. FBI Laboratory .....................................................................195 1. Explosives Unit................................................................195 2. DNA Unit.........................................................................196 3. Comparative Bullet Lead Analysis ...............................198 a. The Examiner.............................................................198 b. The Technique ...........................................................200 4. Fingerprint Unit...............................................................203 a. The Mayfield Affair ..................................................203 b. Other Mistakes...........................................................206 c. Lack of Research .......................................................207 II. REGULATING CRIME LABORATORIES .....................................208 A. The DNA Model....................................................................208 B. Accreditation of Crime Laboratories...................................211 C. Quality Assurance .................................................................213 1. Proficiency Testing..........................................................213 2. Laboratory Audits...........................................................217 3. Corrective Action Procedures .......................................218 D. Standardization of Technical Procedures ...........................219 E. Problem Issues .......................................................................220 1. Cognitive Bias..................................................................220 2. Contemporaneous Recordation....................................222 3. Laboratory Reports.........................................................223 4. Testifying Beyond the Report........................................225 F. Certification of Examiners....................................................227 G. Forensic Science Commissions.............................................227 1. Composition of Commissions ........................................229 2. Investigations ...................................................................231 3. Adequate Funding...........................................................232 4. Register of Defense Experts ..........................................234 CONCLUSION ...........................................................................................234 Electronic copy available at: http://ssrn.com/abstract=1083735 GIANNELLI.FPP 12/17/2007 2:47:57 PM 2007] CRIME LAB REGULATION 165 “At present, forensic science is virtually unregulated—with the paradoxical result that clinical laboratories must meet higher standards to be allowed to diagnose strep throat than forensic labs must meet to put a defendant on death row.” —Eric S. Lander, molecular biologist, 19891 INTRODUCTION In the fall of 2004, the Chief of the Houston Police Department called for a moratorium on executions of convicts from Harris County until after his crime laboratory had completed a review of numerous old case files.2 This breathtaking development in the county where the most death penalty cases originate3 is not an isolated incident of laboratory failure. Earlier, the Governor of Illinois had imposed a moratorium on executions in that state due in part to faulty scientific evidence.4 The extent of forensic science’s role in convicting the innocent is difficult to gauge, although it is clearly substantial. In Actual Innocence, Barry Scheck and his colleagues examined sixty-two of the first sixty-seven DNA exonerations secured in North America through Cardozo Law School’s Innocence Project, concluding that a third of these cases involved “tainted or fraudulent science.”5 A subsequent review identified forensic science testing errors in 63% of the wrongful convictions and false or misleading testimony by 1. Eric S. Lander, DNA Fingerprinting On Trial, 339 NATURE 501, 505 (1989). 2. See Maurice Possley et al., Scandal Touches Even Elite Labs: Flawed Work, Resistance to Scrutiny Seen Across U.S., CHI. TRIB., Oct. 21, 2004, § 1, at 1 (“Gov. Rick Perry has rejected a plea from Houston’s police chief to halt executions of inmates convicted in Harris County until the scope of problems at the police crime lab can be determined.”). According to state senator Rodney Ellis, “the validity of almost any case that has relied upon evidence produced by the lab is questionable.” Rodney Ellis, Editorial, Want Tough on Crime? Start by Fixing HPD Lab, HOUSTON CHRON., Sept. 5, 2004, at D1. 3. See Adam Liptak & Ralph Blumenthal, New Doubt Cast on Crime Testing in Houston Cases, N.Y. TIMES, Aug. 5, 2004, at A19 (“Since the death penalty was reinstated in 1976, Texas has executed 323 people, 73 for crimes in Harris County.”). 4. See generally REPORT OF THE GOVERNOR’S COMMISSION ON CAPITAL PUNISHMENT (State of Ill. 2002), available at http://www.state.il.us/defender/ccpr.html (recommending independent crime labs). Governor George Ryan imposed a moratorium on January 31, 2000 and appointed the Commission on March 9, 2000. Id. at i. 5. BARRY SCHECK ET AL., ACTUAL INNOCENCE: FIVE DAYS TO EXECUTION AND OTHER DISPATCHES FROM THE WRONGLY CONVICTED 246 (2000). There have been 208 DNA exonerations. Brandon L. Garrett, Judging Innocence, 108 COLUM. L. REV. (forthcoming 2008) (manuscript at 2, on file with the North Carolina Law Review). GIANNELLI.FPP 12/17/2007 2:47:57 PM 166 NORTH CAROLINA LAW REVIEW [Vol. 86 forensic experts in 27%.6 A 2004 Chicago Tribune series on crime laboratories reported