Valpeoz, 71, conducts himself with relentless force, but his eyes and the weight he's lost reveal his exhaustion. When he talks about his daughter -- his "Carly," his "Carlita" -- his husky, deep voice breaks into sobs.
For nearly six months he has traveled to nearly a dozen small towns in a remote region of the Peruvian Andes called the Sacred Valley. He takes flyers with his daughter's face printed on them and walks from house to house, interviewing anyone who might have seen her. Living on his savings, money from his son and some GoFundMe
donations, he's been staying in small hotel rooms and trying to spend as little as possible on food and toiletries.
Carla was on her way to an Inca archaeological site near Cusco on December 12 when she vanished and her family's lives turned upside down.
Her father has traveled across mountains, walked through massive cornfields and searched remote caves looking for her. He's developed relationships with the local police, and even embedded with them to search suspected drug houses.
Along with his son, he has tracked down people who met Carla before she vanished, found the backpack that she left behind at a hostel, requested surveillance footage and tried to request cell phone tower data, only to learn that previous police requests were never completed.