The revolutionary character of the period after Sulla is illustrated by the case of perduellio against C. Rabirius[1569] brought in 63 by a tribune of the plebs, T. Atius Labienus. Rabirius was charged with complicity in the murder of L. Appuleius Saturninus, the famous tribune of the year 100. Labienus proposed and carried a plebiscite requiring the praetor to appoint duumviri for the trial, whereas it was generally held at the time that these officials should have been elected by the people. It was also enacted, in violation of the Porcian and Sempronian laws, that in case of conviction the accused should be crucified on the Campus Martius. C. and L. Caesar, appointed duumviri, brought the case before the comitia centuriata, which were prevented from giving their verdict by the removal of the flag from Janiculum.[1570] The object of the trial was not to punish the guilty, but to discredit the senate, to which the accused belonged.[1571] The decline of the idea of popular sovereignty is further indicated by the agrarian rogation of the tribune P. Servilius Rullus, 63, an article of which, in violation of the lex Valeria Horatia de provocatione, ordered the appointment of decemviri agris adsignandis without appeal.[1572]

The procedure was the same in all finable and capital actions. In a case subject to appeal the magistrate, after a preliminary inquiry (quaestio), summoned the people to contio on the third day[1573] for a thorough examination (anquisitio).[1574] The trumpeter blew his horn before the door of the accused, and cited him to appear at daybreak in the place of assembly.[1575] Acting as accuser, the magistrate addressed the contio and produced his witnesses. Then came the witnesses for the defence, the statement of the accused, and the pleading of his counsel. These proceedings filled three contiones separated from one another by a day’s interval. At the end of the third day’s session the magistrate acquitted the accused or condemned him and fixed the penalty. In case of condemnation, the accused if dissatisfied appealed. The magistrate then put his sentence in the form of a rogation and set a date for the comitia,[1576] which could be held only after an interval of a trinum nundinum,[1577] unless the accused desired an earlier trial.[1578] Some scholars, however, hold the theory that a magistrate, recognizing the limitation of his competence, might bring the case directly to the comitia without the formality of a condemnation and appeal.[1579] The penalty proposed in the rogation was not necessarily the same as at first announced; for the trial might bring to light facts to mitigate or to aggravate the sentence. The presentation of the case to the comitia by the magistrate was termed the fourth accusation.[1580] If anything prevented the voting in the comitia, the accused was discharged,[1581] and could not be legally brought to trial again for the same offence excepting under a different form of action.[1582]