	In 2003, Barry Bonds became embroiled in a scandal when Greg Anderson of the Bay Area Laboratory Co-operative (BALCO), Bonds' trainer since 2000, was indicted by a federal grand jury in the United States District Court for the Northern District of California and charged with supplying anabolic steroids to athletes, including a number of baseball players. This led to speculation that Bonds had used performance-enhancing drugs during a time when there was no mandatory testing in Major League Baseball. Bonds declared his innocence, attributing his changed physique and increased power to a strict regimen of bodybuilding, diet and legitimate supplements.