Plaintiff's counsel and defense squared off in a day featuring intensive cross-examination of DNA evidence reliability and a systematic presentation of domestic violence incidents spanning nearly a decade. LAPD criminalist Collin Yamauchi faced aggressive questioning about blood contamination risks—his blood-stained gloves processing evidence just feet away from Simpson's reference vial, and mysteriously appearing blood on socks examined on different dates. Meanwhile, multiple officers testified about domestic violence incidents from 1984 through 1993, establishing a pattern of Nicole Brown Simpson as victim, with audio evidence of her screams and detailed accounts of physical injuries.

• LAPD criminalist Yamauchi processes Simpson's blood vial approximately 10-15 feet from where collected evidence is stored, establishing central contamination risk
• Blood mysteriously appears on socks examined August 4 despite being bloodless during June 29 inspection
• Court excludes expert testimony on spousal homicide profiling, ruling it inappropriately substitutes for jury judgment
• 911 dispatcher recounts hearing slap and woman screaming in early morning call with comment 'female being beaten'
• Detective Edwards describes finding Nicole barefoot, severely beaten, in shock during January 1, 1989 incident
• Sergeant testifies to 1984-1985 baseball bat incident where Simpson shattered windshield while Nicole fled hysterical
• Multiple police officers attacked on credibility with cross-examination exposing inconsistencies between trial testimony and written reports