SOMMA VESUVIANA, ITALY–When 19-year-old Finnegan Elder and 18-year-old Gabe Natale Hjorth were first met by two undercover police officers with Italy’s military Carabiniere police force on a dark street near the Vatican in Rome, they thought they were about to get jumped. According to a 14-page document from the investigating judge, which was reviewed by The Daily Beast, the two Americans had earlier approached Sergio Brugiatelli, a layabout who can always be found on Piazza Mastei in Rome's Trastevere district, for cocaine. Brugiatelli pointed them to a pusher. The Americans allegedly thought they were buying cocaine, but when their €100...