heard about something that happened shortly after claudia and nick started dating. >> claudia was at his house, and jessica showed up, seeing her vehicle in the driveway area and was very upset, banging on the door, saying, i know she's in there. let me in. >> reporter: nick had told his brother, john, about the dustup with jessica. and he thought that was, what, amusing, alarming? >> he's like, man, it's going to be drama. i can already tell. >> and then a day after nick's murder, john's kids snapped these pictures of a woman poking around nick's house. you are on the phone pretty quick with investigators right? >> my kids were adamant it was just. a >> parked outside the house long after the crime. >> right, the woman pulled in the call the sack, then walked out of her car, and down and alleyway into a ravine area.