A Kingsport Man Who Threatened To Kill Someone And Then Barricaded Himself Inside His Home With A Rifle Remains At A Local Hospital For Observation For Pre-Existing Medical Issues. 69 Year Old Larry Castle Is Facing A Charge Of Aggravated Assault. Other Charges Are Pending. He Had Previously Called A Non-Emergency Police Line And Made The Threats. When Officers Arrived At His East Center Street Home, Castle Allegedly Said He Was Going To Kill An Unknown Person, Claiming They Owed Him Large Sums Of Money. He Held Police At Bay For Around 20 Minutes Before Exiting His House And Being Tased.