in the meantime, nutall learned more about the second woman.acted john ruetten, sherri's former husband and now living in san diego. >> john involved he had been involved in a dating relationship with stephanie lazarus. >> reporter: that was the other name on the short list of suspects. nut consist all pressed ruetten for more on their relationship which had started when they were both students at ucla. they dated on and off until john got engaged to sherri. even though you're convinces the relationship that john had with stephanie lazarus overlapped with the relationship he had with his wife? >> we know from john that there was at least on one occasion where he was engaged that he was intimate with stephanie lazarus. there was a love triangle and stephanie lazarus had deep feelings for john ruetten and may have had a motive to harm sherri rasmussen. >> reporter: was sherri's killer a scorned lover or a jealous coworker? >> we had two women on the list who, in our opinion, had a motive to harm her. >> reporter: debra, the nurse, and stephanie l