Need some Advice for my friend.?

Tell your friend to talk to her parents and let them know what she did. Hopefully she has great parents that will be highly disappointed, but will go with her and help her stand up for what she has done wrong. I can understand her panicking, but most stores have the video cameras anyway. If this store does there is a great possibility that she is going to get caught anyway. Who knows. If she thinks her parents are going to find out anyway, it would be better if they heard it from her, than the cops.