scooped up a sample of her trash that contained dna. it was sent to the crime lab in l.a. for analysis. and 72 hours later, came an answer. she was not the donor of the dna profile from the bite. reporter: that left one possible suspect, number five on the list. john rutten s ex-girlfriend, stephanie lazarus. he called the rasmussens. we came home and there was a message that there was a detective that wanted to talk to us, and i thought, oh, yeah, right. i thought it was another false hope. reporter: this is detective nutall. he said that they were opening the investigation. they were upset with me, it was like, detective, where have you been for the last two dec e decaddecade s. reporter: and now, nells rasmussen explained it all saying that someone was stalking his daughter sherry, a woman