Just to add something to this really interesting article, from what I recall about this case, no suicide note from the deceased was found, and according to what was reported from the mainstream media here in Greece there were some really suspicious entries in his diary, including a diagram of the system with some modules marked with questionmarks and one about "Something weird going on in the company". Also he tried to hand in his resignation a few days before the suicide which was not accepted. In retrospective, no one involved in that case seemed to take the right steps to track out the party behind the wiretaps.