|This article is about The TV Series character. You may be looking for his Comic Series counterpart.|
Nothing is known about Barnes' life before or during the outbreak. It is likely that he lived in or near Alexandria before the apocalypse.
Barnes is one of the many Alexandrians present in helping construct walls out on the side of the road, which are designed to corral the horde of zombies along a route away from Alexandria. He is also present at the quarry while the others go over Rick Grimes's plan, and also when the zombies break free, which forces Barnes and the others to take immediate action.
As his group runs through the woods, Barnes complains to Michonne about Rick's actions. Later, after the majority of the group is back together, he is heard yelling and is discovered by them getting his throat ripped out by a zombie. Rick pulls the zombie off of him, and Michonne proceeds to kill it. Michonne is then forced to stab Barnes through the head to end his suffering and prevent his reanimation.
After Barnes complains to Michonne, he is later heard screaming and is found getting his throat ripped out by a walker. Michonne kills the walker and then stabs Barnes in the head to prevent reanimation and to end his suffering.