I took Lily to the family restroom, which was larger and had a lock. I asked the first staff member I found to contact mall security and asked them not to touch the backpack. Lily sat on the counter and swung her legs and tried to look unconcerned. I could see her working at it, the way kids do when they are performing bravery for a parent. I kissed her forehead and told her she had done exactly the right thing, that she was smart and brave and I was very proud of her.