Turnus Herdonius was a leading citizen and statesman of ancient Aricia in Latium

Latium

Lazio is one of the 20 administrative regions of Italy, situated in the central peninsular section of the country. With about 5.7 million residents and a GDP of more than 170 billion euros, Lazio is the third most populated and the second richest region of Italy...

 who spoke out against the last king of Rome

Ancient Rome

Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....

, Lucius Tarquinius Superbus

Lucius Tarquinius Superbus

Lucius Tarquinius Superbus was the legendary seventh and final King of Rome, reigning from 535 BC until the popular uprising in 509 BC that led to the establishment of the Roman Republic. He is more commonly known by his cognomen Tarquinius Superbus and was a member of the so-called Etruscan...

, and was killed as a result.

At the outset of his reign, Tarquinius Superbus called a meeting of the Latin leaders to discuss the bonds between Rome and the Latin towns. The meeting was held at a grove sacred to the goddess Ferentina

Ferentina

Ferentina was the patron goddess of the city Ferentinum, Latium. She was protector of the Latin commonwealth. She was also closely associated with the Roman Empire....

.

At the meeting Turnus inveighed against the arrogance of Tarquinius, and warned his countrymen against putting trust in him. Tarquinius then secretly bribed Turnus' servant to store a large number of swords in Turnus' lodging. Tarquin called together the Latin leaders, and accused Turnus of plotting a coup. The Latin leaders accompanied Tarquin to Turnus' lodging and, the swords then being discovered, Turnus' guilt was then speedily inferred, and he was condemned and was thrown into a pool of water in the grove, and a wooden frame ("cratis") placed over his head, into which stones were thrown, thereby drowning him.

Sources

• Livy
  Livy
  Titus Livius — known as Livy in English — was a Roman historian who wrote a monumental history of Rome and the Roman people. Ab Urbe Condita Libri, "Chapters from the Foundation of the City," covering the period from the earliest legends of Rome well before the traditional foundation in 753 BC...
  
  , Ab urbe condita
  Ab Urbe condita (book)
  Ab urbe condita libri — often shortened to Ab urbe condita — is a monumental history of ancient Rome written in Latin sometime between 27 and 25 BC by the historian Titus Livius. The work covers the time from the stories of Aeneas, the earliest legendary period from before the city's founding in c....
  
  , 1.50-52
• Dionysius of Halicarnassus
  Dionysius of Halicarnassus
  Dionysius of Halicarnassus was a Greek historian and teacher of rhetoric, who flourished during the reign of Caesar Augustus. His literary style was Attistic — imitating Classical Attic Greek in its prime.-Life:...
  
  Roman Antiquities 4.45—4.48