>> when she was subpoenaed to give sworn evidence, emma o'reilly insisted that her memory was clear. >> is there any doubt in your mind as to what happened and what you heard? >> none whatsoever. at all. i can still to this day picture the whole scene vividly. >> she was labelled a traitor by lance armstrong. she was told she'd never work in the business again by the armstrong group. we found her to be extremely credible on the issues in which -- and the things she said she'd seen and done. >> lance armstrong escaped being sanctioned for having a banned cortico steroid in his system. in 2000, a test was introduced for epo. tyler hamilton says that he and lance armstrong continued to dope using microdoses of epo which would pass through the body more rapidly in an