Nothing is known about Jefferson's life prior to or as the outbreak began, except that he worked as a crew member on the USS Pennsylvania.
Jefferson is among the majority of the crew to have been killed in the outbreak.
- Killed By
- Unnamed USS Pennsylvania crewmember (Alive)
At some point, Jefferson was bit and turned into a walker.
- Alvarez (Zombified)
After attacking Winokur, Alvarez shoots Jefferson in the head.
This list shows the victims Jefferson has killed:
- Winokur (Caused, Infected)
- Possibly many enemy combatants (Pre-Apocalypse)
- Possibly several USS Pennsylvania crewmembers (Infected, Alive)
- "Incoming" (Zombified)