An Indian national from Gurgaon has been sentenced to three years in federal imprisonment on charges of call centre fraud that intended to cheat Americans of millions of dollars, a US attorney said. Sahil Narang, 29, who was in the United States illegally at the time of his arrest in May 2019, is described in court documents as a key participant in a sophisticated so-called Tech Fraud and Refund Fraud online telemarketing schemes that targeted technologically unsophisticated computer users, usually senior citizens.