Nothing is known about Oswald's life prior to or as the outbreak began.
At some point in the apocalypse, Oswald joined the Outcasts. When Dwight and Althea are captured and brought to the Outcasts' headquarters, Oswald threatens the pair with their deaths. However, he is stopped by Rollie, prompting Oswald to protest that Dwight works for Ginny, but Rollie points out that he did too at one point, and orders Althea to be released. Rollie invites them to join him, as they're preparing to head out. The group arms up, with Rollie and Oswald revealing they plan on ambushing and destroying the S.W.A.T. van. Al warns them against this, as the van is designed to withstand explosives. Instead, she suggests they steal the van, which they agree to. He accompanies Rollie, Althea, Dwight, and Sherry in hijacking the van and ultimately the group is successful. With newly acquired information as a result of interrogating a captured Reg, Oswald and the others prepare to ambush the Pioneers by calling Virginia to meet them at a rendezvous to locate a newly-discovered settlement. However, their plan is thwarted and the group of rangers led by Hill are spared from an ambush. Oswald and Rollie are not happy with result but retreat back to their headquarters to prepare abandoning post now that the rangers have been nearby. With the tank and a hostage, Oswald and the other Outcasts pack up camp and leave for a new home.
This list shows the victims that Oswald has killed:
- Numerous counts of zombies and possibly unnamed people