In Tacitus' version of the story, Tiberius, now Emperor, instructs Piso, a civil servant, to obstruct Germanicus in his duties at Syria. Which, Tacitus says, he does. He then, possibly, poisons him (Tacitus is less unequivocal here). That's pretty much it. :)
With the whole 'morals' thing: Augustus embarked on a big clean-up of Rome. Before him, sodomy had been unacceptable, and since at one point in the text Tiberius states that Piso was his father's friend, I'm assuming that Tiberius would have been brought up with the old morals. What Augustus didn't manage to sort out, however, was a general Roman yen for conspiracies, poisons, plots, and general political murders.
So there we go. That's the quick version. Anyone want to correct me/ask for expansion or explanation?
