Overview

• Systems engineer Nathaniel Adams testified that Astrea Forensics did not follow 21 nationally accepted verification standards and identified defects in the IDBGEM genotyping program.
• Adams said the software underwent about 65 updates since June 2020 and that one fix released after the Heuermann testing could have compromised the analysis of rootless hairs from six victims.
• Suffolk County District Attorney Ray Tierney challenged Adams’s credentials by noting his decade‐long degree completion, unfinished master’s research and exclusive defense testimony record.
• The prosecution formally rested its case in the Frye hearing that will determine whether probabilistic genotyping evidence linking Heuermann to six of seven killings is admissible at trial.
• Rex Heuermann, arrested in July 2023 and pleading not guilty, faces charges for seven Long Island sex worker murders dating from 1993 to 2010 and remains detained pending trial.