david saacks >> he remembers a patch or some kind of something, you know, on the shirt. >> reporter:ke on the uniform shannon wore as a 911 dispatcher and there was more investigators discovered shannon clocked in at about 10:00 a.m., some two hours after denita smith had been murdered. more than enough time for the 55-mile drive from durham to her job at the 911 center in greensboro so police obtained a search warrant for shannon's house. >> and we do find greensboro communication 911 center uniforms and they are exactly as described by the maintenance supervisor down to the color of the patch and the shape. >> reporter: you find a gun? >> no gun was found. no bullets were found. nothing incriminating other than that >> reporter: and then came this. shannon had told police she had never been to durham, but her cell phone records clearly showed she had been there. not on the day denita was killed shannon or at least her phone had been there the day before. >> she was hitting a tower that placed her no less than 100 feet away from where denita would be found dead the next morning. >>