惩治

It would be corrupting discipline to leave him unpunished.

bring to justice; punish according to law; deal with in accordance with law

punish severely; punish with severity; mete out severe penalty/punishment (to sb)

demand/need discipline; need to be punished

leave sb unpunished; let sb go without punishment

mete out punishment to embezzler; punish grafter

hit against/combat corruption; crack down on corruption; take disciplinary action against corruption

punish crime