Almost nothing is known about Duncan's life prior to or as the outbreak began except that he knew the Greene family before the outbreak.
Duncan was killed sometime after the outbreak. Before his initial reanimation, Otis placed him inside the barn.
Toward the end of the episode, Shane unlocks the door of the barn and the group of Atlanta Survivors shoots everyone that was inside. Duncan was killed along with all the other walkers exiting the barn.
Duncan's body is seen at the beginning of the episode to the ground and is later is burned.
- Killed By
- Zombies (Alive)
Duncan is somehow bitten by walkers and succumbed to the infection. Later, he is put either before or after reanimation inside the farm barn by Otis on Hershel's orders.
- Rick's Group (Zombified)
After Shane forces the barn doors open, a zombified Duncan and the walkers exit the barn and are systematically killed by the survivor group. It is unknown who actually shot and put him down.
This list shows the victims that Duncan has killed:
- Possibly a few zombies