I never stopped looking for my son, even when the search parties dwindled and the posters faded on telephone poles. Four years ago, six-year-old Caleb wandered away from our campsite during a  family hiking trip in the dense Pacific Northwest wilderness. One

moment he was collecting pinecones just a few yards ahead, the next he was gone. We searched until nightfall, then through the darkness with flashlights and prayers. The official search lasted weeks. Volunteers combed the mountains. Drones scanned the canopy. But eventually, the world moved on. Everyone exc…