I don't know details, but he was banned for two years, and I guess that the combination of substances, that was rumored to be found in his body (meldonium, testosterone, some covering substances and testosterone-based enhanced drugs) was really difficult to defend. I don't know if official sentence was published already, but I'm pretty sure that's not the end of those legal battles. Really curious case, especially considering that he was considered to be decent talent on middle, but his season in Piacenza was poor.
That's what I thought too. You do doping and play like that?