Gerald Richards, a forensic photographic analyst formerly with the FBI, provided testimony during the plaintiffs' rebuttal case that systematically challenged defense expert Robert Groden's claims that photographs of O.J. Simpson wearing Bruno Magli shoes had been altered. Through microscopic analysis and precise measurements, Richards rebutted the alteration theory point by point, bolstering the plaintiffs' argument that the photos were authentic. His technical expertise served as a direct counter to the defense's strategy of casting doubt on the photographic evidence linking Simpson to the rare shoes that matched prints found at the crime scene.