Fabio was an Italian airpilot is secretly a member of a murderous cult known as Fiamma Nera and a minor villain in Tomb Raider II.
He was a member of the Fiamma Nera cult for a long time and the personal pilot of Marco Bartoli's seaplane. Marco and Fabio discussed much of Gianni Bartoli and the Seraph shortly before the archeologist Lara Croft would be knocked out by Eros and captured.
It is possible that Fabio was killed in Tibet since all of the cult's mercenaries with Uzi guns that arrived there looked like Fabio while they were trying to eliminate Lara Croft.
Tomb Raider: Curse of the Sword
Tomb Raider: The Prophecy
Lara Croft and the Guardian of Light