New Sports Illustrated video on Evidence implicating Barry Bonds

Do rather significant body changes experienced by Barry Bonds over the years prove that he used steroids? Is the testimony of non-medical people, like Bonds's former personal shopper, about medicines Bonds was using less persuasive because they lack scientific background or more persuasive because they speak in plain-spoken language? I talk about those and other issues with Maggie Gray of Sports Illustrated Video.