BALCO founder Victor Conte, who served four months in prison after pleading guilty to steroid distribution, repeatedly accused Jones of using performance enhancers.
Conte said he had supplied Montgomery and his partner, Jones, with the designer steroid THG (tetrahydrogestrinone), EPO (erythropoietin) and insulin.
"After I instructed her how to do it and dialed it up, she did the injection with me sitting right there next to her -- right in front of me," Conte told the ABC News magazine 20/20.
Conte said he started the programme for Jones prior to the 2000 Olympics and continued afterwards.
Scientists determined the new drug was THG, a chemically related compound of the banned drug gestrinone designed to evade the testers.