tense DNA expert Dr. Robin Cotton continued her direct examination with dramatic population frequency statistics—most notably placing the socks evidence at one in 6.8 to 530 billion rarity. Defense attorney Peter Neufeld then launched a sustained cross-examination attacking the reliability of this DNA evidence through detailed contamination hypotheses, extracting Cotton's admission that under his hypothetical involving contact between degraded Bundy swatches and Simpson's fresh reference blood, her laboratory could not detect whether that contamination had occurred, while also challenging the adequacy of the statistical databases. The day concluded with a motion hearing regarding whether Robert Kardashian could testify as a prosecution witness.
- Dr. Cotton testified socks DNA matched Nicole Brown at frequency of 1 in 6.8-530 billion—rarer than entire human population
- Neufeld pursued a contamination hypothetical based on Bundy and Rockingham samples being processed simultaneously in the same room
- Cotton conceded that under Neufeld's contact hypothetical, no test in her laboratory could detect whether that contamination had occurred
- Defense elicited that the 1-in-170-million DNA frequency figure rested on a database of 146-240 African Americans from a single Detroit Red Cross donation pool
- Judge Ito imposed $250 sanctions each on both counsel for violating speaking objections rule
- Judge Ito granted a future hearing before another judge on proposed questioning of Robert Kardashian, suggesting Judge Czuleger subject to availability