as officers searched the scene. then police made a disturbing discovery. >> unbeknownst to the officers, a 14-year-old girl was in the changing room behind a wall that was behind the suspect and out of the officer's view. she was in the changing area with her mother when the officers encountered the suspect and the shooting occurred. >> reporter: they believe that she was hit by a bullet that ricocheted off the floor and entered the dressing room wall. >> she discovered that she had been struck and was deceased at the scene. >> reporter: the 14-year-old girl was shopping with her mother when she was killed. she died from a gunshot wound to the chest. the los angeles medical examiner listing her death a homicide. police also described the suspect's earlier movements and released closed circuit video from the store. >> he smashed a computer video, he hit the glass , next he took the escalator down and encountered another female and she resisted. >> reporter: the attorney