History of the Peloponnesian War

By his arguments then he persuaded him, that he ought, even if he had not done the deed, both to save himself by gaining a promise of impunity, and to stop his country from its present suspiciousness: for that his preservation was more sure, if he confessed with a promise of impunity, than if he denied it, and were brought to trial.

Accordingly he informed both against himself and some others, respecting the Mercuries; and the Athenian people having gladly ascertained, as they supposed, the truth of the matter, and having been before indignant at the thought of not discovering those who had plotted against their commons, immediately set at liberty the informer and his companions, such as he had not accused; while with regard to those who were charged with the crime, having brought them to trial, they executed all of them who were seized, and having passed sentence upon those who had fled, proclaimed a reward in money for any one who slew them.