The instructions were clear: He had four days to make each victim fall in love. And there were a lot of victims. Online, Safeer Mohammed Koorimannil, who was trafficked to a scam center in Myanmar, impersonated a 28-year-old Singaporean woman named Ella. On a typical shift, he said, he chatted with more than 100 people across dozens of profiles at the same time, as supervisors prowled among the desks with electric batons. In just a month, Koorimannil targeted some 50,000 victims from at least 17 countries, according to records he smuggled out to The Associated Press. His “clients” included a...