The defense mounted a sustained attack on DNA evidence through the cross-examination of Cellmark laboratory director Dr. Robin Cotton, challenging evidence storage conditions and arguing that wet blood swatches left in sealed bags in hot, unrefrigerated trucks could degrade and produce false results. Scheck also accused the prosecution of a 'forensic ambush' by delaying RFLP testing on Bronco evidence items. Procedural disruptions, including a courtroom power surge, and factual corrections regarding seized cash punctuated the day's contentious proceedings.

• Dr. Robin Cotton's cross-examination focused on the defense's challenges to biological evidence storage and potential DNA degradation
• Defense used photographs of the actual Bundy swatches to illustrate differences in DNA quality between samples while questioning storage conditions
• Power surge triggered automatic shutdown of courtroom air conditioning and heating system
• Defense accused prosecution of forensic ambush strategy regarding delayed RFLP testing on combined Bronco items
• Prosecutor corrected prior day's misstatement—cash was found on Cowlings' person, not in OJ's black bag
• Statistical frequency calculations for boot stain mixture evidence incomplete, delayed until Monday