There have been lots of rumours of the last couple of seasons.
From Cancellara's Paris-Roubaix acceleration [1] to Ryder Hesjedal's [2] bike "moving on it's own", to even Chris Froome [3] Tour accusation it's been getting heated at the top levels.
The UCI introduced mobile scanning machines in 2010 [4] and this would be the first actual confirmed case.