A Church Hill Man Had To Be Extricated From His Vehicle After It Veered Into A Tree Off Northbound Interstate 81 In Greene County Near Exit 36. 37 Year Old Michael Ketron Was Airlifted By Wings Air Rescue To Holston Valley Medical Center In Kingsport Following The Wreck. He Is Listed In Critical Condition. According To The Tennessee Highway Patrol, Charges Are Pending As The Investigation Continues.