Dr. Werner Spitz, a forensic pathologist, testified for the plaintiffs with a detailed reconstruction of both victims' wounds, concluding the entire attack lasted under 15 seconds. He identified fingernail marks on Simpson's hands as consistent with the victims resisting, directly linking Simpson to a physical struggle. The defense subjected Spitz to aggressive cross-examination, with Robert Baker challenging his murder reconstruction, timelines, and blood evidence through pointed questions and physical demonstrations, but Spitz survived redirect and recross examinations.