tense Barry Scheck cross-examined LAPD DNA analyst Collin Yamauchi about his training, supervision, proficiency testing, and the workload and priority attached to the June 14-15 DNA analysis. Exhibit 1182 showed Erin Reilly as confirming analyst on one proficiency-test record, while reciprocal confirmation and prior knowledge of her results were described conditionally. Yamauchi said the case was a priority but denied receiving a fixed deadline and said he worked within scientific constraints. He acknowledged handling 23 samples and tubes while the Amplitype guide recommended a manageable number of approximately 15.
- Scheck established Yamauchi had at least six months of casework experience before the Simpson case
- Yamauchi testified that no PhD in molecular genetics supervised or advised the lab and that lab supervisor Matheson had testified his subordinates knew more about DNA than he did
- Exhibit 1182 showed Reilly as confirming analyst on one of Yamauchi's proficiency-test records; reciprocal confirmation and prior knowledge of her results were discussed as conditional possibilities.
- Yamauchi acknowledged handling 23 samples and tubes in the June 14 run while the Amplitype guide recommended a manageable number of approximately 15 to reduce mix-up and contamination risk.
- Scheck identified potential discrepancies between LAPD DNA validation study records and analysis sheets produced in discovery, which Yamauchi had not yet confirmed
- Juror #12 removed for good cause, replacement drawn by lot
- Yamauchi directed to review and confirm validation records over the weekend