lawsuits, still has the prescription pad. >> you don't want to answer any questions? >> reporter: why is this man, dr. lind webster walking away from our cameras? refusing to answer our questions. webster is considered a leader in the field of pain management. president of the american academy of pain medicine. >> over 100 million americans who are experiencing chronic pain. >> reporter: author of a scoring system used by doctors to distinguish pain killer addicts from legitimate patients. and he's the founder of this pain clinic in salt lake city. what is his reputation? >> his methods are incorporated into almost every single educational program about prescribing opioids and even accepted by the fda. >> reporter: if you start to ask around a bit, his reputation among some former patients and their families is astonishingly different. >> his reputation is he's known as dr. death. >> reporter: known as dr. death?