Acestes was the son of a Trojan woman Egesta, and a Sicilian river deity named Crimisus.
When the Trojans refused to pay thanks to Poseidon and Apollo, whom helped them with their wall. The gods punished Troy by sending monsters to infest the city and devour it's citizens.
Egesta's father feared for his daughter's safety. He sent her to Sicily where she met the river god Crimisus and conceived the hero Acestes.
In Virgil's epic, The Aeneid, Jupiter shows favour to Acestes during a a trial of skill by setting aflame the arrow Acestes had shot.
Acestes went on to become one of the founders the Sicilian city of Segesta.