He has been suspended because he was found positive in an anti doping test on september 22nd!
He made use of cocaine.
Rumors say that it's years that he uses cocaine and that's the reason why he didn't play for a couple of months some years ago. He was in the US to detoxify. It seems that he didn't succeed
Other rumors say that this is the reason why Moggi decided to sell him.
'twas Del piero and vialli who zeman thought.
but there was a few others. eg. davids, blasi, zidane. But zidane i think it was for a voltaren tablet that was illegal.