Does Forensic DNA Help to Solve Crime? The Benefit of Sophisticated Answers to Naive Questions

Abstract

Forensic science has played an increasingly important role in the investigation of crimes. We argue in this paper that, in addition to bench science, field experimentation involving forensic methods is critical to properly assess the relative utility of various methods of solving crimes. We illustrate this point by summarizing the findings from a recent Campbell Collaboration systematic review of field studies of the effectiveness of DNA testing. Our search identified five studies, including one randomized-controlled-trial of the value of DNA testing in burglary cases. The findings generally support the value of DNA testing for police investigations, particularly for high volume crimes such as burglary, although most of the empirical evidence is methodologically weak. Additional work is clearly needed, not only with respect to DNA testing but other forensic methods as well.

Keywords

evaluation DNA forensic investigation systematic review

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References

Briody, M. ( 2004). The effects of DNA evidence on the criminal justice process . Retrieved from Dissertations and Theses Database. (Australian Digital Theses Program)

Committee on Identifying the Needs of the Forensic Science Community, National Research Council. (2009). Strengthening forensic science in the United States: A path forward (National Academy of Science Report No. 2006-DN-BX-0001). Retrieved from http://www.ncjrs.gov/pdffiles1/nij/grants/228091.pdf

Cooper, H. , Hedges, L.V. , & Valentine, J.C. (2009). The handbook of research synthesis and meta-analysis (2nd ed.). New York, NY: Russell Sage Foundation.

Dunsmuir, W.T. , Tran, C. , & Weatherburn, D. (2008). Assessing the impact of mandatory DNA testing of prison inmates in NSW on clearance, charge and conviction rates for selected crime categories. State of New South Wales: Attorney General’s Department of NSW.

Jackman, T. ( 2006). Man gets 40 years for 1994 slaying solved with DNA. The Washington Post. Retrieved December 23, 2006, from http://www.washingtonpost.com/wp-dyn/content/article/2006/09/22/AR2006092201363.html

Lipsey, M.W. , & Wilson, D.B. ( 2001). Practical meta-analysis. Applied social research methods series. Thousand Oaks, CA: Sage .

Roman, J.K. , Reid, S. , Reid, J. , Chaflin, A. , Adams, W. , & Knight, C. ( 2008). The DNA field experiment: Cost-effectiveness analysis of the use of DNA in the investigation of high-volume crimes. Washington, DC: Urban Instittue-Justice Policy Center .

Schroeder, D. ( 2007). DNA and homicide clearance: What’s really going on? Journal of the Institute of Justice & International Studies, 7, 279-298.

Shadish, W.R. , Cook, T.D. , & Campbell, D.T. (2001). Experimental and quasi-experimental designs for generalized causal inference. Boston, MA: Houghton Mifflin.

10.

Smith, G.C.S. , & Pell, J.P. ( 2003). Parachute use to prevent death and major trauma related to gravitational challenge: Systematic review of randomised controlled trials . British Medical Journal, 327, 1459-1461. doi:10.1136/bmj.327.7429.1459

11.

Tully, L. ( 1998). Examination of the use of forensic DNA typing from two perspectives. Retrieved from Dissertations and Theses Database. (UMI Microform)

12.

Wilson, D.B. ( 2010). Meta-analysis. In A. R. Piquero & D. Weisburd (eds.), Handbook of quantitative criminology (pp. 181-208). New York, NY : Springer.

13.

Wilson, D.B. , Weisburd, D. , & McClure, D. ( 2009). Use of DNA testing in police investigative work for increasing suspect identification, arrest, conviction, and case clearance [Protocol] . Campbell Systematic Reveiws. Available at http://www.campbellcollaboration.org