|Quest(s)||A Wounded Crank|
“Who the hell are you people? I don't know who to trust any more. You're not with the government are you? Chances are, they're the wankers responsible for this catastrophe. A bio-weapon gone bad most likely.”
— Sam talking about the infection.
When the Hero finds him, he is hiding from attacking zombies, but he has an injured arm. Once the Hero clears the area of undead, he gives the Hero the side quest A Wounded Crank, in which the Hero must give him either bandages or a first aid kit.
Once he has some medical supplies, he claims that he will get to the bottom of the infection, and that he will find the secret government laboratory where they created the disease. His status is unknown after he leaves the bunker as he is never seen in the jungle again nor is he ever seen at the laboratory.
Presumably, if he ever found the lab, it would be more than likely after it was overrun as none of the scientists ever mention him. A plausible outcome regarding his fate is that he was likely killed either while trying to locate the lab or after he found it, given the large amount of zombies present when it is overrun and the fact that he was traveling alone.