. >> reporter: jessica stillwell, another of nick's girlfriends from marana aerospace.ut six months, even lived together for a while. >> she seemed nice. never saw them argue. they always seemed happy and giggling together. >> detective garcia learned that didn't last. nick abruptly kicked jessica out of his house and his life and moved claudia into both. and then garcia 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. >> my children were adamant that it was jessica. >> does it seem at all significant to you that nick was murdered like almost exactly a year from the t