I get the feeling he's telling the truth. Looks kind of sad and bewildered.
are there any controls in place to protect the riders from some mischief in the lab?
Well, I put in about six years working in toxicology and testing of hormone
levels (by radioimmunoassay). This was about 2 decades ago.
No matter the level of care...lab mistakes are always a possibility.
Add in the politics and money that comes with a Tour de France win...and I don't
immediately discount the possiblity of subterfuge.
Even with those saintly scientists in those crisp white labcoats.
Or anybody in the "chain of custody" from the testing of the sample, down
to the person typing the result into the lab computer.