. >> she hooked up with a -- a friend of hers, a childhood friend by the name of jason flores. >> a timeline was coming together. she picked up jason in her bmw. >> she and jason had referred to each other as cousins because they had been neighbors growing up when they were younger, but they had drifted apart. she had really just kind of connected with jason about two weeks before. >> at 6:51 pm, a second selfie. >> jason took a selfie of the two of them where you can see sarah driving. and she's so happy. i mean, she was just beaming, you know. she just looked like a happy kid, like, for her first night out in a while. >> they picked up brandon allen, a good friend of jason's and a new friend of sarah's and headed over to a small gathering, a dozen or so young people hanging out in this front yard. investigators estimate they stayed there about 40 minutes. before they left, they took this group shot at 10:18 pm. that's sarah in the pink sweatshirt next to jason. >> where does she go? does she go home? >> no. at that point, she and jason are going to go back to brandon's house. and he lives