diane parrish who lives just a few houses down from nathan and denise remembered seeing a strange manher street right around the time of the murder. >> so describe the man you saw walking along this road. >> he had a black hoodie sweatshirt on with the hood pulled up. and his hands were in the pocket. and i will never forget the look on that man's face. >> what was so odd about the look on his face? >> he was very agitated. i knew immediately something was wrong with him. >> reporter: neighbors were anxious, and detectives were puzzled. denise's neighborhood was normally very quiet, not the type of place you'd expect a burglary. even if she had accidentally stumbled upon an intruder, how had it turned so vicious so quickly? >> why would somebody wanna come into this particular house? >> it's not typical as far as a burglary that results in a murder. >> reporter: maybe, it wasn't a burglary at all. >>> if it wasn't a burglary, what was it? was nathan's life also in danger? >> nathan's parents told me that nathan and the three children had been moved to a safe house just to protect them