>> this room is the epo room. in this room we perform the anti-doping analysis for epo. >> at the time a test for epo was still not ready. >> the test for detection of epo was developed in this laboratory. so i personally performed the development of this test. and it took a very long time. it took about six years to develop this test. and it was ready in 2000. >> four years later, as part of the lab's research but not as part of a formal testing process, the 1999 samples were re-examined. and some were found to contain the banned drug. six samples given by lance armstrong were found to contain epo. >> why was it only revealed years later that these samples belonged to lance armstrong? >> it was only a coincidence of events. a journalist requested from the