I've skimmed it. he has tested, retested and tested again until he found a tiny trace of a hormone. If you test for something often enough you'll find it. In any event who hangs on to samples of piss for six years. I'm still not impressed by these allegations.
Like I said some people just resent success.
Although it is a very unpopular fact, there is actually no knowledge of how the various EPO recombinants change over time. It is really not possible to validate whether testing an old blood sample is able to give a valid result