The defense presented forensic experts MacDonell and Baden to argue blood evidence was planted and multiple perpetrators were involved. However, plaintiffs' counsel Medvene systematically dismantled their credibility — exposing MacDonell's inconsistent observations of sock blood stains (ranging from 6-7 to 12 to 'maybe 30' spheres) made without notes or testing from an uncertified home lab, and forcing Baden to admit his two-perpetrator opinion met only 'more likely than not' standard rather than his required certainty threshold. The day epitomized defense expert testimony collapsing under aggressive cross-examination.

• MacDonell testified blood on Simpson's socks showed artificial application via wet transfer, supporting planted evidence theory
• Medvene exposed MacDonell's fatal methodological flaws: inconsistent observations (6-7 vs. 12 vs. 'maybe 30' red spheres), no notes, no independent photos, never tested spots for blood, 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