Tyler Hamilton hands over gold medal to U.S. Anti-Doping Agency
In a "60 Minutes" interview that aired Thursday, Hamilton admitted that he had used banned substances and accused Lance Armstrong and other members of the U.S. Postal Service cycling team of doing the same.
The International Olympic Committee investigated Hamilton for doping in 2004, but the case was dropped after his backup sample was erroneously frozen.
The 40-year-old retired from cycling in 2009 after failing a doping test for the second time in his career, though he said the results were influenced by medication he was taking for depression.
Viatcheslav Ekimov, Hamilton's former U.S. Postal Service teammate, is expected to be upgraded from silver.
-- Melissa Rohlin
The Associated Press contributed to this report.
Photo: Tyler Hamilton holds up his gold medal after winning the men 's road individual time trial at the 2004 Olympic Games in Athens. Credit: Eric Risberg / Associated Press.