The elderly man charged with fatally shooting his neighbors at their apartment complex in Dallas on Monday denied killing Michelle Jackson, and said he acted in self-defense when he killed her fiancé, Jamie Stafford. According to an arrest warrant, Chung Kim, 75 — incensed that Jackson and Stafford put dog feces near his front door — shot Jackson as she stood on her balcony above his first-floor apartment. He then stalked upstairs and fired at Stafford, the warrant says, who was attempting to escape through the back patio door.