Disgraced former Tour de France champion Lance Armstrong, stripped of his seven Tour titles last fall and banned from cycling competition for life, has reportedly confessed in an interview with Oprah Winfrey that he used performance-enhancing drugs during his cycling career. UCLA has an expert.

Anthony Butch is director of the UCLA Olympic Analytical Laboratory, the largest World Anti-Doping Agency–accredited sports drug–testing facility in the world and one of the leading research institutions in the field of athletic doping. Butch oversees more than 40 scientists who analyze more than 40,000 specimens each year for traces of banned substances intended to give athletes an unfair competitive edge.

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