(March 31, 2020, 2:45 PM EDT) -- BOSTON — John Kapoor, the founder of opioid drug maker Insys Therapeutics Inc., was ordered March 30 to report to federal prison on May 19 to begin serving his 66-month sentence for paying kickbacks to doctors to prescribe the company’s fentanyl-based drug Subsys (United States v. John Kapoor, No. 16-cr-10343, D. Mass.)....