An Elizabethton Attorney Has Pled Guilty In U.S. District Court In Greeneville To Tax Evasion. 65 Year Old Thomas Cowan Jr. Admitted To The Charge Friday. He Was Indicted In March Of This Year And Was The Result Of An Investigation By The Irs. Cowan Is Set To Be Sentenced In U.S. District Court In Knoxville On April 12th Of Next Year.