Von Longo was known in the Imperial criminal system as Inmate ICN 28740, was the father of Kale and Trig Longo, prisoners being transported to a detention moon by the Imperial prison barge Purge. He died in a medbay after being tortured by Captain Jareth Sartoris, in 1 BBY and Kale wasn't there, the only thing Kale regretted about his life. The barge broke down during the trip and the brothers were told by a guard named Wembly that Purge had discovered a derelict Star Destroyer and a crew was sent to scavenge parts.
After being tortured by Sartoris, Von was barely recognizable. He was brought to the medical bay and cared for by Cody, who tried to make him as comfortable as possible and even fulfilled his final request by taking his son to see him. While Von Longo lay there dying, he mistook Trig for Kale and told him "look after his brother." Upon his death, Von's body was taken to the Purge's morgue, where it turned alongside the rest of the ships passengers. While the 5 survivors tried to escape to the derelict Star Destroyer, Trig saw his father in the crowd of zombies and ran after him. Kale pushed his brother out of the way, but was bitten instead, resulting in his death. Trig felt responsible for Kale's death and felt he should have been bitten instead.
When some form of virus the crew brought back spread through the Purge, it killed all but six people. The brothers were unaffected, hearing screams and smelling the dead bodies in the cells around them. No guards were left either and the brothers were not receiving food. During this time, Kale wrote an unfinished and unsigned letter to Von and hid it under his mattress, though Trig found it without his brother's knowledge and added to it. Trig talked about their current position and, due to the limited space below Kale's message, left off at the sound of footsteps approaching the cell. The letter was recovered aboard Purge after its occupants were decimated by the plague and it was released to the public for academic purposes in relation to the history of Purge.
- Death Troopers: Recovered Messages from Purge