Athletics coach Trevor Graham, who helped launch a three-year U.S. government probe of doping by elite athletes, is expected to be charged with obstructing the investigation, two people with knowledge of the investigation told The Associated Press.

Speaking on condition of anonymity because the charges had not been made public, the Justice Department officials said Graham would be charged with making false statements to authorities investigating steroid use in sports.

Graham operates Raleigh, North Carolina-based Sprint Capitol USA, a team of about 10 athletes that includes 100-meter co-world record holder Justin Gatlin, who tested positive for testosterone and other steroids in April.

He also coached sprinter Marion Jones, who won five medals at the 2000 Sydney Games with him, and her former boyfriend Tim Montgomery, who was suspended from competition for two years, although he never tested positive for a banned substance.

Several of Graham’s athletes, however, have tested positive for banned substances, and the coach is being investigated for lying to investigators looking into doping among elite athletes connected to the Bay Area Laboratory Co-Operative (BALCO), the now-defunct Burlingame supplement company that served as a front for a steroids ring.