A Kingsport Man Accused Of Printing Thousands Of Dollars In Counterfeit Bills Has Been Ordered To Spend Time In A Federal Prison. A Federal Judge In U.S. District Court In Greeneville Sentenced 30 Year Old Gerren Neff To 27 Months. Judge Ronnie Greer Also Ordered Him To Serve Three Years Of Supervised Probation Upon His Release, 500 Hours Of Substance Abuse Treatment And Educational Programs. Neff Allegedly Produced The Bills To Pay For His Drug Habit.