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.