On a winter day north of the Arctic Circle, nine-year-old Elsa—daughter of Sámi reindeer herders—sees a man brutally kill her beloved reindeer calf and threaten her into silence. When her father takes her to report the crime, local police tell them that there is nothing they can do about these “stolen” animals. Killings like these are classified as theft in the reports that continue to pile up, uninvestigated. But reindeer are not just the...