Plaintiff's counsel and defense squared off in a day featuring intensive cross-examination of DNA evidence reliability and testimony about domestic violence incidents spanning nearly a decade. LAPD criminalist Collin Yamauchi faced aggressive defense questioning about contamination—his handling of Simpson's reference blood before processing the Rockingham glove, and his differing observations and test results for the socks on June 29 and August 4. Lambert responded with blank PCR controls and testimony that evidence items were kept in closed containers. Meanwhile, a dispatcher and multiple officers testified about incidents from 1984 or 1985 through 1993 involving Nicole Brown Simpson, including an open-line 911 call and accounts of physical injuries and property damage.

• Yamauchi testifies that he processed Simpson's reference blood vial in the same room, about 10-15 feet from stored collected evidence, a fact used in the defense contamination argument
• Yamauchi testifies that he saw no blood on the socks on June 29 but obtained a positive phenolphthalein result on August 4
• Court excludes spousal-homicide profiling experts and bars Fuhrman's prior criminal-trial testimony and references to his perjury conviction
• 911 dispatcher recounts hearing what she characterized as a slap and a woman screaming during an early morning call
• Detective Edwards describes finding Nicole barefoot, cold, wet, shivering, and severely beaten during the January 1, 1989 incident
• Sergeant Mark Day testifies that in 1984 or 1985 he found Nicole hysterical and crying, a damaged Mercedes and a baseball bat, while Simpson admitted losing his temper
• Multiple police officers attacked on credibility with cross-examination exposing inconsistencies between trial testimony and written reports