- "We made it! We made it!"
- —Martin, after reaching the exit to the mall[src]
Nothing is known about Martin's life prior to or as the outbreak began. It's possible he lived in or near Virginia.
Martin is seen in the makeshift camp when Dwight introduces Negan. He is seen sitting by the campfire. Martin is shown killing walkers as they escape an overrun building.
Martin is first encountered in Issue 100 when Negan and the Saviors capture Rick Grimes while they are on there way to the Hilltop Colony. He is seen holding a baseball bat and watched as Negan smashed Glenn's skull in, beating him to death.
Martin is later seen in Issue 103, in the background, walking into Alexandria Safe-Zone with Negan and a few other Saviors to collect the supplies that the Alexandrians owe them. He is later seen in Issue 105 when he watches Mark's face burned and looks somewhat shocked.
Martin is later seen in Issue 111 walking into the Alexandria Safe-Zone to get more supplies from the people from the survivors. He appears again in Issue 112 standing around with Negan as Rick is talking to him. He later is seen exiting the van he is in after the driver is shot and killed. He exits with Seth and Seth is shot in the head whereas Martin survives. He is then seen in Issue 113 with Negan and a few other Saviors, holding Rick, Nicholas, Heath and Holly hostage. He is finally seen in Issue 114 when he is seen trying to shoot Paul Monroe. After the attack, he is seen escorting another wounded Savior into the Sanctuary.
Martin later appears in Issue 123 when he is seen in the crowd of Saviors that are being explained the plan to attack the Hilltop Colony. Martin survives the attack and retreats back to the camp with Negan and Dwight.
Martin is in the revolt against Alexandria led by Sherry, who wants to try to take over the Alexandria Safe-Zone. Martin and the rest of the Saviors depart from Alexandria peacefully after the death of Sherry.
Martin is not seen or mentioned in the fifteen to twenty year time-skip, leaving his fate unknown.
This list shows the victims Martin has killed:
- Numerous counts of zombies and possibly unnamed people
- This character's name was confirmed in Here's Negan.