One night during preparations for the expedition, the hermai, heads of the god Hermes on a plinth with a phallus, were mutilated throughout Athens. This was a religious scandal and was seen as a bad omen for the mission. Plutarch explains that Androcles, a political leader, used false witnesses who accused Alcibiades and his friends of mutilating the statues, and of profaning the Eleusinian Mysteries. Later his opponents, chief among them being Androcles and Thessalus, Cimon's son, enlisted orators to argue that Alcibiades should set sail as planned and stand trial on his return from the campaign. Alcibiades was suspicious of their intentions, and asked to be allowed to stand trial immediately, under penalty of death, in order to clear his name. This request was denied, and in 415 BC the fleet set sail, with the charges unresolved.