Kris and Lisanne came to Panama to learn Spanish and assist with local kids as volunteers. On April 1, 2014, Kris Kremers, 21, and Lisanne Froon, 22, both from the Netherlands, embarked on a 5- to 6-hour hike near Boquete, close to the Panamanian Continental Divide. But by no means is their cause of death clear. The mysterious disappearance of Kris Kremers and Lisanne Froon has haunted Panama for nearly a decade.