This motion relies on the Federal Rules of Evidence to argue for exclusion of expert DNA testimony about the likelihood ratio obtained using STRMix probabilistic genotyping software. Pages 5-8 describe the basic steps of DNA extraction and analysis. Pages 8-9 discuss the problems of trace DNA and the possibility of innocent transfer of DNA. Page 11 explains how DNA analysis is less reliable when there is a complex DNA mixture and pages 12-15 discuss the danger that jurors will misunderstand (and prosecutors will misrepresent) what a likelihood ratio actually means.
File Type: docx
File Size: 48 KB
Categories: 403, DNA, DNA Mixture, Evidence, Expert Testimony, Forensics, Improper Argument by Prosecutor, Juries, Juror Psychology, Likelihood Ratio, Secondary Transfer, Witnesses