. >> reporter: deputy district attorney keith watanabe was assigned to the case on day one. >> did itgest to you that she had been hoarding money in anticipation of something? >> she was preparing for a change in her life. >> reporter: but did the change involve divorce or murder? julie's father john cihak lived here 30 miles or so from jason and julie's house. this, apparently, was where julie and the kids spent the night after the shooting. so sgt. smith got a search warrant for dad's place and found nothing useful. there were other guns but none of them fired the bullet that killed jason. perhaps a little frustrated eight days later he got a second search warrant. and this time there was something new: tucked away in the garage attic. in a spot they searched the first time around a blue backpack. must have been hidden between searches. >> they opened up this blue backpack and they discovered julie harper's wallet, credit cards and id, her passport, a different gun and jason harper's last will and testament. >> reporter: also, jason's cell phone. its batteries removed and call and t