devastating Barry Scheck spent the day cross-examining LAPD DNA analyst Collin Yamauchi about the lab's validation procedures, evidence-handling protocols, and documentation. Key testimony addressed the extraction of Simpson's reference blood in the same session, location, and timeframe as evidentiary samples; the arrival of the blood vial unsealed contrary to written protocol; and Yamauchi's observation of nothing that appeared to be blood during a cursory June 29 visual review of the socks, when no chemical test was performed. Scheck also highlighted contrasts between Yamauchi's August 1994 testimony and his more detailed trial recollections, while questioning missing timestamps and procedural records.
- Yamauchi acknowledges that his mock vaginal swab test produced a 1.2,4 result rather than the 1.2,1.3 type listed for the sperm cells and that he did not note the difference in his papers, while maintaining that the result was acceptable carry-over
- Yamauchi concedes reference blood extracted in same session, location, and timeframe as Bundy evidentiary samples—suggesting potential cross-contamination
- Defense reveals O.J. Simpson's blood vial arrived at lab unsealed, contradicting LAPD protocol
- Yamauchi testifies that he saw nothing appearing to be blood on the socks during a cursory June 29 visual review, while emphasizing that no chemical test was performed
- Yamauchi's memory exposed as inconsistent: vague in August 1994 but newly specific with details emerging for first time during cross-examination
- Judge Ito sustains objection to improper question about Simpson's 'airtight alibi' and instructs jury to disregard
- Prosecutor Harmon demands immediate discovery and threatens sanctions for bad faith non-production