Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Judicial procedure took the form of a public or a private process, according as the king interposed of his own motion or only when appealed to by the injured party. The former course was taken only in cases which involved a breach of the public peace. First of all, therefore, it was applicable in the case of public treason or communion with the public enemy (-proditio-), and in that of violent rebellion against the magistracy (-perduellio-).
But the public peace was also broken by the foul murderer (-parricida-), the sodomite, the violator of a maiden's or matron's chastity, the incendiary, the false witness, by those, moreover, who with evil spells conjured away the harvest, or who without due title cut the corn by night in the field entrusted to the protection of the gods and of the people; all of these were therefore dealt with as though they had been guilty of high treason. The king opened and conducted the process, and pronounced sentence after conferring with the senators whom he had called in to advise with him.
He was at liberty, however, after he had initiated the process, to commit the further handling and the adjudication of the matter to deputies who were, as a rule, taken from the senate. The later extraordinary deputies, the two men for adjudicating on rebellion (-duoviri perduellionis-) and the later standing deputies the "trackers of murder" (-quaestores parricidii-) whose primary duty was to search out and arrest murderers, and who therefore exercised in some measure police functions, do not belong to the regal period, but may probably have sprung out of, or been suggested by, certain of its institutions.
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Reference address : https://www.ellopos.net/elpenor/rome/1-11-law-justice.asp?pg=5