Document Category: DNA Mixture
| Title | Content | Date Filed | Jurisdiction | Categories | Link | hf:doc_author | hf:doc_categories |
|---|---|---|---|---|---|---|---|
| Motion to Exclude DNA Testimony About Likelihood Ratios Obtained Using STRMix Probabilistic Genotyping Software | 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. | May 20, 2024 | National, Washington | 403, DNA, DNA Mixture, Evidence, Expert Testimony, Forensics, Improper Argument by Prosecutor, Juries, Juror Psychology, Likelihood Ratio, Secondary Transfer, Witnesses | national washington | 403 dna dna-mixture evidence expert-testimony forensics improper-argument-by-prosecutor juries juror-psychology likelihood-ratio secondary-transfer witnesses | |
| Amicus Brief – DNA Probabilistic Genotyping Software is Likely to Have Errors Impacting Reliability | Amicus brief from the Innocence Project explains genotyping software, similar software programs used in courts that were shown to be unreliable, and why defense access to the software source code is necessary. | October 27, 2020 | 3rd Cir., New Jersey | DNA, DNA Mixture, Evidence, Forensics | 3rd-cir new-jersey | dna dna-mixture evidence forensics | |
| Amicus Brief – DNA Mixtures, Probabilistic Genotyping Software is Unverifiable | This amicus brief from the Legal Aid Society explains how probabilistic genotyping software works, why it’s unreliable, and why the defense has to be granted access to the software’s source code to present a full defense | October 15, 2020 | 3rd Cir., New Jersey | DNA, DNA Mixture, Evidence, Forensics | 3rd-cir new-jersey | dna dna-mixture evidence forensics | |
| Motion to Exclude DNA “Likelihood Ratio” Testimony | Argues that “likelihood ratio” evidence — the statistical frequency of a suspect’s characteristic — has not been sufficiently validated and is misleading to the jury because the jury conflates it with probability of guilt. | February 23, 2018 | 6th Cir., Michigan | DNA, DNA Mixture, Evidence, Forensics, Juries, Juror Psychology, Likelihood Ratio | 6th-cir michigan | dna dna-mixture evidence forensics juries juror-psychology likelihood-ratio |