Critias

Critias, the Athenian orator, poet, and statesman, was a relative of Plato, and a pupil of Socrates. He appears to have devoted himself to intrigues in Thessaly and at home, with the result that he was exiled in 406 B.C. Returning with Lysander he became one of the Thirty Tyrants, and put to death Theramenes and others. He was killed in 404 whilst resisting Thrasybulus.