So I'm replaying episode 1 atm, doing a new file just for fun while I wait for ep 5. At the beginning as this cop is rambling on to you, he tells you a story about this psychopath he had in the back of his car, cutting up his wife and stuff. Now, Walking Dead has it's share of red herrings and the like, much like any video game series of course, but this one... He goes into a surprising amount of detail.
So my thought is... Could this be the dude who grabbed Clementine?