"Hamilton further claimed that Armstrong tested positive for EPO during the 2001 Tour de Suisse; "60 Minutes" reported that the UCI intervened to conceal those test results, and that donations from Armstrong totaling US$125,000 may have played into said actions.Martial Saugy, chief of the Swiss anti-doping agency, later confirmed that they found four urine samples suspicious of EPO use at the 2001 race, but said there was no "positive test" and claimed not to know whether the suspicious results belonged to Armstrong.