Merle can be first seen in Silver Lake Trailer Park, being held hostage. After being saved, he can give the Deputy a mission where they have to get Merle's car back.
Merle is soon kidnapped again and held hostage in the mission The Cleansing. The Deputy saves him along with a helicopter pilot.
It is unknown what happened to Merle after the nuclear holocaust. If he is still alive, he would be most likely in his sixties.
- There is a character in Whitetail Mountains with the same lastname, but it's unknown if he is related to Merle.