He called in under a minute. I kept my voice low and told him exactly what we had found, exactly what the notification said, and exactly what Diane’s message had been. He went silent for a few seconds in a way I recognized, the silence of a man updating a belief he had been resisting for a long time. Then he said, “Stay inside. Go to security. I’m leaving.”

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.

“Are we in trouble?” she asked.

“Absolutely not,” I said. “You told the truth. That’s all I ever need you to do.”

A security officer named Mr. Hernandez arrived and walked us toward the office near the food court. I was carrying the backpack in one of the plastic bags from our shopping, keeping it as untouched as I could while still keeping it with me.

That was when I looked through the front doors of the mall and saw a blue SUV pulling into the fire lane.