all of her friends because they changed a lot depending on who she was hanging out with at the moment. but it wasn t familiar at all. reporter: a police officer came and took a report. james, meanwhile, called up the gps function on annie s cell phone. it put her around or about the golf course out in riverton and within a mile of that, which is around the bridge area. reporter: the bridge at the jordan river, just a couple miles from their home, a place joggers and horseback riders frequent during the day and young lovers at night. james, veronica and the officer watched as annie s phone pinged across the computer screen in realtime. you re watching her move. yes. when it moved so fast, our immediate assumption was, okay, she s getting in a car. reporter: so this is a hot pursuit now, looking for your girl? yep. reporter: and then the signal just stopped. veronica drove to a walmart near where they d tracked annie s phone. and i have her picture on my cell phone. and
reporter: a police officer came and took a report. james, meanwhile, called up the gps function on annie s cell phone. it put her around or about the golf course out in riverton and within a mile of that, which is around the bridge area. reporter: the bridge at the jordan river, just a couple miles from their home, a place joggers and horseback riders frequent during the day and young lovers at night. james, veronica and the officer watched as annie s phone pinged across the computer screen in realtime. you re watching her move. yes. when it moved so fast, our immediate assumption was, okay, she s getting in a car. reporter: so this is a hot pursuit now, looking for your girl? yep. reporter: and then the signal just stopped. veronica drove to a walmart near where they d tracked annie s phone. and i have her picture on my cell phone. and i m showing it to the people that are sitting at the front, the greeters, going, have you seen this girl? reporter: are you collect
reporter: was he in and out of the picture for her as the boyfriend of the moment? uh-huh. reporter: his stock would rise and fall? yep, she was crazy about him. reporter: chris told veronica he didn t know where annie was, but he did have some potentially significant information. chris said annie told him she was running away with a guy named l.j. we were shocked. because, i mean, we didn t know all of her friends because they changed a lot depending on who she was hanging out with at the moment. but it wasn t familiar at all. reporter: a police officer came and took a report. james, meanwhile, called up the gps function on annie s cell phone. it put her around or about the golf course out in riverton and within a mile of that, which is around the bridge area. reporter: the bridge at the jordan river, just a couple miles from their home, a place joggers and horseback riders frequent during the day and young lovers at night. james, veronica and the officer watched as
the shooting and what tower near the murder scene had the phone pinged off we had tons of and i m not exaggerating, thousands upon thousands upon thousands of phone calls that hit all these various towers in that electronic hay stack a sharp eye found a call around the time they believe brandy was killed it was from a number with a 310 area code. that s southern california the county lawman traced the number back to an anonymous phone, a burner purchased in vai zanesville a week before brandy died he only called two people a second burner phone and josh daniels. those were the only two. was this their break through? that burner phone at the right time, right place had called josh s phone in alaska then the phone texted another ex- traction of josh s phone and
maybe he told her, i ll take you home to fort worth. reporter: fortenberry pointed to records from cell phone towers that he said proved she was in the car. he said christina s phone battery was almost drained as she and enrique approached the garage that night. not surprisingly their phones were pinging near each other. then, it gets a bit murky. reporter: the prosecutor explained that after the camaro left the garage, it passed through a toll station heading north on the highway. but about ten minutes later, christina s phone pinged off a tower back near the shopping mall and then so did enrique s, almost as if they d made a u-turn. and i think something changed. i think maybe he put the moves on her and started making sexual advances towards her and she was not okay with that. and then maybe is when the altercation began. reporter: detectives testified they d seen injuries on enrique s arms and hands.