For six months, my eight-year-old son kept drawing the same man — tall, smiling, always wearing a bright red hat. I thought it was just a bedtime story that had stuck in his imagination. Until the morning, someone knocked on our door.

For six months, my eight-year-old son kept drawing the same man — tall, smiling, always wearing a bright red hat. I thought it was just a bedtime story that had stuck in his imagination. Until the morning, someone knocked on our door.