Not a trial, but the Susurluk scandal in Turkey in 1996 showed the link of Turkish organized crime with the government. The Turkish government used Turkish gangs to assassinate high ranking members of separatist organization operating in Turkey (primarily the PKK) and their sponsors. The scandal also showed the public of how the Turkish government was involved with heroin trafficking in to Europe and a lot of more things like money laundering. The scandal even showed that the Turkish government backed a coup in Azerbaijan just to control drug routes.
This scandal all was the result of a car crash in which a Turkish mob boss, his girlfriend and a high ranking Istanbul cop were killed with one survivor: a member of the parliament who also was a Kurdish clan leader.
The trials resulting from the scandal weren't significant as almost no one in the political world was convicted or whose convictions were overturned after the investigations were seen as unreliable. However the whole system of corruption and co-operation of the Turkish government and Turkish intelligence agency with the Turkish mob became public which obviously was a big thing.