The day was dominated by a pre-trial admissibility dispute over evidence of alleged prior domestic violence. The prosecution presented Dr. Donald Dutton's testimony on controlling behavior, estrangement, and intimate-partner homicide risk; Bailey challenged whether Dutton could ethically opine on Simpson and whether counsel's hypotheticals fit batterer patterns, followed by redirect and recross. The defense also pressed its legal opposition, while Judge Ito questioned whether case law supported the prosecution's estrangement theory. Separately, scheduling of the Fuhrman motion prompted a sharp exchange between Darden and Cochran over racial prejudice and a racial slur.

• Dr. Dutton testifies that separation increases a woman's risk of being killed by a factor of six
• F. Lee Bailey cross-examines Dutton using the expert's own professional framework and research against him
• Judge Ito presses prosecution on whether case law actually supports the 'estrangement theory'
• Defense delivers comprehensive legal opposition arguing domestic violence evidence should be excluded entirely
• Bailey asserts that the prosecution has a 'hypothetical letter' and the defense has a copy, then withdraws it after Judge Ito says it would not help his ruling