Account of His Martyrdom
According to a devotional account (the only substantive narrative located for him), Eusebius came forward of his own free will before the prefect of Phoenicia and rebuked him for persecuting the Christian community, reportedly asking what senseless deed he was doing in harrying the flock of Christ.
The same account relates that this bold declaration angered the prefect, who ordered Eusebius suspended and his body lacerated, and that he bore his sufferings with striking composure. The prefect, said to be confounded by his endurance, finally ordered him beheaded. Because this narrative is devotional rather than documentary in character and carries no date, named official, or scholarly citation, its details should be read as tradition.
Catholic reference works give a parallel but sparser outline, describing Eusebius as openly declaring himself a Christian during an unspecified persecution in Phoenicia and being tortured and put to death; they classify his recognition as pre-Congregation (predating formal canonization procedures).