My 10-year-old son returned from the airplane restroom and whispered, “Mom… Dad is sitting near the front.” I almost laughed—his father had been missing for three years. Then I saw the scar on the stranger’s wrist and the way he rubbed his empty ring finger, the exact habit my husband had whenever he was nervous. I followed him off the plane without saying a word. But when another woman ran up and called him by a different name, everything I believed about my husband’s disappearance collapsed.

I pulled out my phone. I zoomed the camera lens in to maximum capacity.

I waited until they walked out the sliding glass doors toward the passenger pickup lane. I snapped a dozen high-definition, rapid-fire photographs. I didn’t photograph their faces; I photographed the license plate, the make, and the model of the sleek, black luxury SUV they climbed into, securing the crucial intelligence necessary to hunt him.