[To Be Quite Honest]

Originally Posted by Boblobla

IDK if it would have been Mearl, he had no way of knowing that his brother wasn't at the camp and I don't think he would unleash zombies on his brother.

Spoiler!

In the comics, the zombies just show up iirc

You are correct with the spoiler.

Spoiler!

There are apparently two types of Zombies. The hunting or roamer kind, and the sleeper ones that just lay there till you walk by them. The roamers follow each other and mimic each other. eg) One tries a door knob, and if another sees this they will try the door knob and so on. When one starts walking in a direction another will start walking. Eventually you will get a wandering group like the ones who attacked the camp.