[3] Salomies concurs in this identification, while proposing that his adoptive parent was Gnaeus Pinarius Aemilius Cicatricula, governor of Africa in 80.
[7] After his consulate, he held two more governorships: Moesia Superior, on the Danubean frontier, from 93 to 96;[8] then he was transferred to Pannonia, a nearby province, which Longinus administered until the year 99.
By the year 105, despite initial victories, the war was going badly for Decebalus; "nevertheless," writes Dio Cassius, "by craft and deceit he almost compassed Trajan's death.
Having obtained some poison with which to kill himself, he first sought to help his freedman gain safety, so wrote out a letter to Trajan beseeching him to consider the terms of the offer, and convinced the king to allow his man to deliver this letter; after the freedman had departed, Longinus drank the poison that night and killed himself.
Dio Cassius concludes, "Trajan neither sent him back nor surrendered the freedman, deeming his safety more important for the dignity of the empire than the burial of Longinus.