A Maryville doctor in East Tennessee who pleaded guilty in federal court to running his Knoxville pain clinic as an illegal drug premise has been sentenced.Dr. David Newman, 61, of Maryville has been sentenced to three years of probation with 100 hours of community service, a fine of $10,000 and a special assessment of $100. He was charged with maintaining his Tennessee Valley Pain Specialists clinic in South Knoxville as an illegal drug premise.