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.
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
Motion to Exclude – STRMix and DNA Likelihood Ratio Evidence
Argues that the likelihood ratio produced by STRMix software is unreliable because “the program’s code relies upon information that is subjective and can vary to an impermissible degree depending on the individual analyst and laboratory.” Explains factors that impact the reliability of probabalistic genotyping software, including threshold levels (what the lab considers data vs. noise), […]
Transcript – Daubert Hearing – STRMix
This hearing challenges the validity and reliability of STRMix DNA mixture analysis. Government witness: John Buckleton (creator of STRMix); defense witness: Nathan Adams (explains likelihood ratios, impact of number of contributors on the program’s output, problems with STRMix implementation
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.
