Gelblum cross-examines defense photo analyst Groden about credentials, resume descriptions, tabloid contacts and photographic methods, using other frames to challenge claimed anomalies. Groden disputes several premises and explains his work. The defense then calls toxicologist Rieders on EDTA. Cross-examination raises alternative compounds, contamination, quantities and degradation; Rieders gives qualified responses while maintaining his identification opinion and elaborating on redirect. The court also addresses wireless microphones, exhibits in a witness's briefcase and a reported spectator incident that Fujisaki later says did not occur. The trial then recesses for two weeks.

• Gelblum questioned Groden's formal photo-analysis training, paid authentication work and resume descriptions. Groden acknowledged limited credentials and paid work while disputing or explaining the claimed resume inflation.
• Gelblum demonstrated that the 'anomalous' blue lines Groden claimed proved forgery in the Simpson shoe photograph actually appeared on multiple frames from the same photographic roll.
• Gelblum impeached Groden with deposition testimony in which Groden had said he was 'not sure' the Bruno Magli shoe photograph negatives were fake.
• Courtroom discovery that Groden had left the courtroom with court exhibits in his briefcase, prompting Judge Fujisaki to rebuke counsel for lack of organization.
• An in-chambers hearing addressed wireless microphones brought into the courtroom by defense attorney Robert Blasier's wife and a Fox Television producer; both women were excluded after one microphone was found switched on.
• Defense counsel reported that a courtroom spectator had displayed a composite graphic image depicting Simpson slitting Nicole's throat to two elderly jurors, but Judge Fujisaki later said bailiffs confirmed the incident did not occur.
• Defense toxicologist Dr. Frederic Rieders testified that EDTA detected in blood stains from Simpson's sock and the back gate indicates blood from purple-top collection tubes, supporting the defense's blood-planting theory.
• Judge Fujisaki adjourned the trial for a two-week holiday recess and issued strict jury admonitions against media exposure and discussion of the case.