Regicide Regicide The broad definition of regicide ( "of king" + ' "killer" or ' "killing") is the deliberate killing of a monarch, or the person responsible for the killing of a person of royalty. In the British tradition, it refers to the judicial execution of a king after a trial, reflecting the historical precedent of the trial and execution of Charles I of England. More broadly, it can also refer to the killing of an emperor or any other reigning sovereign. Before the Tudor period, English kings had been murdered while imprisoned (for example Edward II or Edward V) or
Thomas Lister (regicide) judge in the trial of Charles I, but only attended a few sessions of the court and did not sign the death warrant. In February 1651, he was appointed a member of the council of state. He was MP for the county of Lincolnshire in the Protectorate Parliaments but he once again represented the city in 1659 with the recall of the Rump Parliament. At the restoration, he was excluded from the Indemnity and Oblivion Act, because of his role in the trial and execution of Charles I and was tried for regicide. He knelt at the bar of the