The historians
Dionysius of Halicarnassus and
Valerius Maximus, connect the practice of
poena cullei with an alleged incident under king
Tarquinius Superbus (legendary reign being 535–509 BC). During his reign, the Roman state apparently acquired the so-called
Sibylline Books, books of prophecy and sacred rituals. The king appointed a couple of priests, the so-called
duumviri sacrorum, to guard the books, but one of them, Marcus Atilius, was bribed, and in consequence, divulged some of the book's secrets (to a certain
Sabine foreigner Petronius, according to Valerius). For that breach of religion, Tarquinius had him sewn up in a sack and thrown into the sea. According to Valerius Maximus, it was very long after this event that this punishment was instituted for the crime of parricide as well, whereas Dionysius says that in addition to being suspected of divulging the secret texts, Atilius was, indeed, accused of having killed his own father. The Greek historian
Plutarch, however, in his "Life of
Romulus" claims that the first case in Roman history of a son killing his own father happened more than five centuries after the foundation of Rome (traditional foundation date 753 BC), when a man called Lucius Hostius murdered his own father after the wars with
Hannibal, that is, after the
Second Punic War (which ended in 201 BC). Plutarch, however, does not specify
how Lucius Hostius was executed, or even if he was executed by the Roman state at all. Additionally, he notes that at the time of Romulus and for the first centuries onwards, "parricide" was regarded as roughly synonymous with what is now called
homicide, and that prior to the times of Lucius Hostius, the murder of one's own
father, (i.e.,
patricide), was simply morally "unthinkable". According to Cloud and other modern scholars of Roman
classical antiquity, a fundamental shift in the punishment of murderers may have occurred towards the end of the 3rd century BC, possibly spurred on by specific incidents like that of Lucius Hostius' murder of his father, and, more generally, occasioned by the concomitant brutalization of society in the wake of the protracted wars with Hannibal. Previously, murderers would have been handed over to the family of the victim to exact their vengeance, whereas from the 2nd century BC and onwards, the punishment of murderers became the affair of the Roman state, rather than giving the offended family full licence to mete out what
they deemed appropriate punishment to the murderer of a relative. Within that particular context, Cloud points out that certain jokes contained in the plays of the early 2nd century dramatist
Plautus may be read as referring to the recent introduction of the punishment by the sack for parricides specifically (without the animals being involved). Yet another incident prior to the execution of Malleolus is relevant. Some 30 years before the times of Malleolus, in the upheavals and riotings caused by the reform program urged on by
Tiberius Gracchus, a man called Caius Villius, an ally of Gracchus, was condemned on some charge, and was shut up in a vessel or jar, to which serpents were added, and he was killed in that manner. ==First-century BC legislation==