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 lab tests could not detect cross-contamination, 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 constructed detailed cross-examination showing simultaneous lab processing of Bundy and Rockingham samples could have caused contamination
• Cotton conceded her lab possessed no test capable of detecting whether cross-contamination had occurred
• Defense exposed the database supporting key DNA frequency statistics contained only 146-240 African Americans from single Detroit Red Cross pool
• Judge Ito imposed $250 sanctions each on both counsel for violating speaking objections rule
• Court scheduled hearing before Judge Czuleger on whether Robert Kardashian could testify regarding Louis Vuitton garment bag