The extent of Marion Jones’s performance-enhancing drugs programme was laid before a court here yesterday when Angel Heredia, the Mexican who is a self-confessed supplier of drugs, claimed that he was asked whether Jones could load three drugs into the same syringe.

The court heard on Tuesday that, in the run-up to the Sydney Olympic Games in 2000, Jones was receiving drugs from Victor Conte, the founder of the Balco laboratory in Burlingame, California. However, evidence yesterday suggested that she was also on another comprehensive drugs programme designed by Heredia.

Trevor Graham, Jones’s former coach, is on trial for three counts of perjury; he is charged with lying about his relationship with Heredia, specifically claiming to have had no contact with him. Heredia, a former discus thrower, told the court yesterday that Graham had asked him to design a drugs programme for Jones aimed at helping her to qualify for the United States 4 x 400 metres relay team for Sydney.

Jones famously dubbed her target for the Sydney Olympics as the “Drive for Five”, five gold medals of which the 4 x 400 metres relay was the most ambitious because it was an event in which she had had little competitive experience. Heredia claimed that Graham “was telling me that it was very important to make the team in the 400 metres to make the five gold medals. He wanted a system to help her out. He wanted me to tell him what would be the best time to start [taking the drugs] without causing any problems.”

Heredia claimed that he supplied Jones with erythropoietin (EPO) and human growth hormone and that, because he failed to supply a drug he had been asked for, a peptide hormone called IGF1, he supplied insulin instead. Four weeks before leaving for Sydney, Graham and C. J. Hunter, Jones’s husband at the time, allegedly contacted Heredia to express their concerns that Jones was suffering from severe acne on her face. “That would have been caused by the EPO,” Heredia said yesterday.

Heredia also said that around the same time before the Sydney Games Graham had phoned him to ask if Jones could inject all three of these drugs simultaneously from the same syringe. “Jones was afraid of needles and they also didn’t want to show too many \ marks,” Heredia told the court. Heredia claimed that he advised Graham against this three-in-one cocktail.

Heredia’s information yesterday was revelatory because previously it was known only that Jones had been using drugs supplied by Conte. The court was told on Tuesday how Conte had advised Graham on how to smuggle drugs into Sydney. Yesterday’s evidence suggests that she had not only one laboratory in California fuelling the “Drive for Five”, but Heredia’s suppliers in Mexico were also working on the same project.

However, Jones was not the only athlete with whom Heredia worked, the court heard yesterday. Heredia spoke at length about his work with Tim Montgomery — who broke the world 100 metres record by running 9.78sec in September 2002 — Dennis Mitchell, Antonio Pettigrew and Jerome Young, the Olympic gold medal-winners, and with three other athletes, Garfield Ellenwood, Duane Ross and Ramon Clay.

Heredia said that he would not only supply these athletes with performance-enhancing drugs, but he would take them to Mexico to have them blood and urine-tested so that he and Graham could ensure that the drugs were not causing any health problems and monitor the effectiveness of these drugs on their bodies.

Heredia said that Graham thought that Montgomery and Mitchell were potential world-record breakers. Regarding Mitchell, whom he first met in 1997, Heredia said: “Trevor thought he could be the guy to break the world record.” On Montgomery, he said: “Graham told me that he was an excellent asset in terms of breaking the world record.”

Fedex receipts shown to the court also indicated the extent of Heredia’s alleged drugs supply to Graham’s athletes. In one week in February 2000, for instance, Montgomery received two packages from Heredia. Both contained drugs, Heredia claimed.

As this week has progressed and the heavy load of incriminating information has been laid out before the court here, it has become increasingly apparent that the International Olympic Committee and IAAF, the governing body of world athletics, may be faced with the unenviable task of reassessing and possibly redistributing medals from previous championships. Young, for instance, won four gold medals in his career — the 4 x 400 metres relay at the 1997 and 2001 World Championships, and the 2000 Olympics, and he won the individual 400 metres at the 2003 World Championships in Paris. Pettigrew also ran in those three winning relay teams.

There was clear evidence presented in court yesterday suggesting that Pettigrew was receiving drugs before the 1997 World Championships. Therefore, the Great Britain team from that year — Roger Black, Jamie Baulch, Iwan Thomas and Mark Richardson — would be particularly interested, given that they won silver. Black has a right to wonder to what extent his career was the victim of cheating because, when he won his 400 metres silver medal at the 1991 World Championships, Pettigrew took the gold.

The IAAF, however, has a rule that it will not redistribute medals from any championship outside of an eight-year window. This would leave these Britons with a moral claim for gold medals but nothing more.

The trial continues.