The trial spent the entire day in aggressive cross-examination of prosecution DNA statistician Dr. Bruce Weir, with defense attorney Peter Neufeld systematically attacking the reliability of his mixture frequency calculations, the representativeness of his databases, and his statistical methodology. The defense demonstrated that Weir's calculations contained errors and made assumptions that could drastically alter results. Late in the day, the prosecution introduced chain-of-custody witnesses to establish proper evidence handling, while disputes erupted over late discovery of witness materials.

• Peter Neufeld cross-examined Dr. Bruce Weir on DNA database reliability, showing that mixture frequency for a single sample could range from 1-in-2 to 1-in-3500 depending solely on assumed racial composition.
• Neufeld exposed that Weir's methods had never been used in any U.S. criminal court prior to this case.
• Dr. Weir acknowledged his mixture frequency calculations contained unintentional errors that were corrected on redirect.
• On recross, Neufeld revealed that Weir omitted two conservative statistical adjustments (FST correction and 99% confidence limits) that would have made frequencies more common.
• Chain-of-custody witnesses Denise Lewis and Cheri Lewis testified to establish proper receipt and handling of victims' evidence from the Coroner's office.
• Defense objected to late discovery of 33 pages of witness materials, forcing scheduling disputes over upcoming cross-examinations.