NEW YORK — A witness in the federal investigation into performance-enhancing drugs said he advised and supplied track coach Trevor Graham and his athletes, including Marion Jones, as well as Maurice Greene, The New York Times reported on its Web site.

Citing court filings, the newspaper said Saturday that Angel Guillermo Heredia, identified as Source A in the felony indictment, agreed to be a cooperating witness when investigators confronted him with evidence of his own drug trafficking and money laundering. The Times reported Heredia said he has provided prosecutors with the names of many elite track athletes and Olympic medal winners, as well as documentation.

The newspaper said in recent interviews Heredia described how and with whom he worked, sharing copies of records that appear to link him to many of the best sprinters of the last decade, including e-mail exchanges of doping regimens, canceled checks, telephone recordings, shipping records, and laboratory readings of blood and urine samples, as well as Justice Department documents.

Among his clients, Heredia identified 12 Olympic medalists, including Greene, the two-time Olympic gold medalist and five-time world champion who has never been previously linked to performance-enhancing drugs. Greene has never failed a drug test, and the newspaper said Greene didn't respond to numerous requests for comment.

The Times said Heredia showed it a copy of a bank transaction form showing a $10,000 wire transfer from a Maurice Greene to a relative of Heredia's, two sets of blood-test lab reports with Greene's name and age on them and an e-mail message from a close friend and track club teammate of Greene's, attaching one of the lab reports and saying, "Angel, this is maurices results sorry it took so long."

Graham, charged with three counts of making false statements, has pleaded not guilty. The Times reported his lawyers have said they will expose prominent athletes who were Heredia's clients, and that they'll prove him to be a tainted witness who continued to dispense drugs and who should be the one facing charges.

Jones is serving six months in prison for lying to investigators about using performance-enhancing drugs and her role in a check-fraud scam.