In reply to sebastian dangerfield:
Some 20 years ago I was friends with someone on a prominent gb team, who 'claimed' they were clean, but x and y (household names) were using stuff and employing chemist to then develop other masking drugs.
Did I then go public, of course not. Whilst it's as likely as unlikely to be true. I had zero evidence and it could be rivalry, personality clash or jealously that started the rumour spreading etc.. if my friend really believed it, then it was up to them to take it through the proper channels.
If you know something to be true, then speak out.
Post edited at 12:33