The defense mounted a significant forensic challenge through Dr. Michael Baden's testimony on blood evidence and wound patterns, while Medvene challenged his descriptions and prior statements. Baden disputed the claimed inconsistencies and maintained on redirect that multiple perpetrators were more likely than not. The defense also presented Michael Gladden, who observed Simpson arriving at LAX around 11 p.m., and eyewitness Thomas Tallarino, who claimed to see a suspicious person near the crime scene; Tallarino's account was contested over observation and location discrepancies and later clarified through testimony about a diagram error. A jury member was removed during the lunch recess, and fingerprint evidence showed no matches to Simpson among 17 recovered prints.

• Dr. Michael Baden extensively cross-examined on blood evidence inconsistencies, prior television statements, and inability to independently support two-assailant theory
• Jury member removed during lunch recess without explanation
• Michael Gladden testified that he observed Simpson arriving at LAX around 11 p.m. on the night of the murders
• Thomas Tallarino's account of seeing a crouching person near 875 South Bundy was challenged over his opportunity to observe and location discrepancies, with later testimony attributing the discrepancy to a diagram or street-name error
• Fingerprint examiner testified 17 latent prints recovered from scene with none matching O.J. Simpson