Луций Корнелий Цинна
As a tribune of the plebs in 137 BC he successfully proposed in the Concilium Plebis the "lex Cassia tabellaria" (a measure to change the voting system to one of secret ballot). In 127 BC he was consul with Lucius Cornelius Cinna and in 125 BC he was elected censor. He was renowned for severity as a iudex and gained fame by formulating the question "Cui bono?" ("Good for whom?", or "Who benefits?") as a principle of criminal investigation.