I dont know if any one on this thread has actualy given a test sample for medical control?
I have and and though its a long time ago I doupt much has changed.
IIRC this was the procedure.
Firstly several empty containers are offered for the rider to select two from for A@ B samples. The samples are then put into seperate padded soft containers that are zipped up and sealed with a tamper proof tag.
The rider again can select the tag from several offered. Each tag has a unique number and seals the zip in a manner that the container can only be opened by breaking the tab. Each tab has a unique number on it that is recorded on a form that the rider then signs to the efect that he / she is happy with the manner in which the samples is taken is correct.
Everything is done in the presence of the athlete.
Only if sample A records a possitive test is sample b container ever opened and the rider is entitled to be present and check the tag number against those recorded on the adminstration form that he has signed and remain present during the testing of that sample to ensure all is done correctly.
There may be slight variation to that procedure these days but I see no way at all that sample be can be tampered with.
While undoubtly degredation of an incorrectly stored sample might possible the important point is that NOTHING can be added to the sample.
If EPO or anything else that shouldnt be there is found it can only be there when the sample was originaly taken.
Having been present when a sample was given in a police station I can vouch that police procedure was all but identical.
In other words good enough for the British Home Office to approve and be admissible in UK courts.
Its possible that I`ve missed somthing in this description , it`s been a long time but I think you can get the picture.
If anything much has changed in the intervening years since my days of taking medical controls I would imagine it`s to ensure even less possibility of tampering with samples than the procedure I`ve descibed.
Other than the possibility that samples have not been stored correctly ( but the emphasis is that NOTHING could have been added ) then Armstrongs B samples contain exactly what they contained the day they were taken.
Hope this helps a few peeps realise that sample are not screw top jars with sticky labals stored in a fridge.