William Bodziak, an FBI footwear expert, delivered key physical evidence for the prosecution, testifying that the bloody shoeprints at the Bundy crime scene matched a size 12 Bruno Magli shoe — consistent with the defendant's shoe size, which Bodziak determined by examining Simpson's own Reebok sneakers rather than measuring his feet directly. Called back during the prosecution's rebuttal, he directly countered defense expert Henry Lee's testimony, arguing with what he called "absolute proof" that imprints Lee identified as possible second-shoe impressions were actually concrete finishing marks or post-murder deposits. His testimony spanned multiple rounds of examination by both Hank Goldberg and Marcia Clark, and he faced aggressive cross-examination from F. Lee Bailey and later Barry Scheck, who exposed methodological gaps including Bodziak's failure to search the FBI's own computerized shoe database.