@Patch
You slightly open the door, not without the plasteel chain on, and you see Earl, standing in front of you, moaning and grunting. His act is pretty convincing, or at least you think it's an act, and he keeps on begging you to see him. "Come on doc, I think there's something wrong" says the man, extending his left hand forward. With the dim light you think you see a dark liquid covering his hand, almost crimson in colour, but you're not sure.
A look and you do notice Earl has a stiff right leg. For some reason, he seems to move around a lot but he's not moving his right leg. In the darkness, you can't be certain but you're quite sure you saw something move behind the car parked about 7 meters away from the entrance.