The defense presented forensic experts MacDonell and Baden to argue blood evidence was planted and multiple perpetrators were involved. However, plaintiffs' counsel Medvene systematically challenged their credibility — highlighting MacDonell's inconsistent observations of sock blood stains (ranging from 6-7 to 12 to 'maybe 30' spheres), lack of useful notes or testing, and uncertified home lab, and eliciting Baden's admission that his two-perpetrator opinion met only the 'more likely than not' standard rather than his stated standard of reasonable medical certainty. The day featured contested forensic opinions and aggressive cross-examination of both defense experts.

• MacDonell testified blood on Simpson's socks showed artificial application via wet transfer, supporting planted evidence theory
• Medvene challenged MacDonell's methodology: inconsistent observations (6-7 vs. 12 vs. 'maybe 30' red spheres), no useful notes, photographs he did not take, no testing of the spots for blood, and an uncertified home laboratory
• Dr. Michael Baden qualified with credentials including 20,000+ autopsies and JFK/MLK assassination panel work
• Baden advanced two-perpetrator theory based on wound analysis and difficulty of simultaneous victim control
• Medvene forced Baden to concede his two-perpetrator opinion was only 'more likely than not,' contradicting his stated standard of 'reasonable medical certainty'
• Baden disclosed $100,000+ compensation and post-criminal-trial TV appearances as Simpson advocate
• Dispute erupted over scope of Dr. Henry Lee's prior shoe print testimony