A New York City pain management doctor was convicted on Friday of manslaughter and other charges for selling narcotics prescriptions to 20 patients, including two who fatally overdosed.

A jury in Manhattan Supreme Court found Stan Li, 60, guilty on nearly 200 criminal counts, including manslaughter, grand larceny and drug trafficking, the New York City Special Narcotics Prosecutor, Bridget Brennan, said in a statement.....