In “Days Gone Bye” we meet Morgan, a man who is squatting in a house near Rick’s home. We see Morgan later in the episode shooting, and killing, zombies on the street in front of the house.
This house is located at the intersection of Ormond St SE & Rawlins St SE in Atlanta, nearly around the corner from the house used as Rick’s house.
http://img.photobucket.com/albums/v698/Leuthen2/WalkingDead/WalkingDeadLocations/TWDLScreencaps/MorgansHse001.jpg