Spoilers for Deus Ex: Mankind Divided - A Criminal Past follow!
As a Junkyard member in the Pent House, Wilburg oversaw the Junkyard's operations in harvesting augmentations from inmates executed at the prison. However, Wilburg got into a dispute with fellow a Junkyard member known by the name Oscar Mejia. As a result, Mejia hacked a sentry bot, which then killed Wilburg.
After Wilburg's death, his body was taken to the infirmary and stripped of its augmentations. An augmented heart, which appears to have belonged to Wilburg, can be found in the solitary confinement section of the prison.