lisa patterson's husband told police he came home to find his wife dead in their home jam.dence that suggests otherwise. once again, here is dennis murphy with the beauty mystery. >> reporter: it is funny in criminal investigations how sometimes things fall into your lap from the most unexpected places. that is what happened in the middle of july, 2009. lisa had been dead for a couple of weeks. detective mike davis have been ahead of his desk preparing subpoenas for the patterson case, when he took a call from the manager of a local burglar alarm company. he told the detectives that one of his salesman had gotten off the phone with the customer, who had some questions about how his home surveillance system worked. the customer was scott patterson. did the cops want to know something more about this. detective davis said indeed they did, and explain how they went out to the partisan house and checked out the video set up. notice when they pick popped the tray on the recorder, there was no dvd. no dvd no pictures right? detective davis almost fell out of his chair when he hea