I agree that I would think if they have it on tape they would have stopped her upon leaving. She stashed the box behind some other items. I think she is afraid of them finding the box, looking back on the tapes, seeing her and somehow tracking her down. She is really freaking out, which is good...
My sister just admitted to me that she stole something earlier today. It was from a major retailer. She took it out of the box, pocketed it, and left the store. She was never suspected (that she knows of) or caught. She left and came home. I am thinking the item was worth about 150 or 200...