A Kingsport Man Has Been Sentenced To 11-And-A-Half Years In Prison For The 2022 Death Of Matthew Isenberg. 37-Year-Old Corey Vaughn Was Found Guilty Of Manslaughter And Assaulting An Officer Last Month. Isenberg’s Mother Gloria Says The Sentence Brings Some Justice, Though His Sister Haley Wished For A Longer Term. Vaughn Remains In The Sullivan County Jail Facing Additional Charges.