As of noon, the suspect was being treated at a local hospital.
"A concealed carry permit holder saw the threat, took action on the threat and stood by until officers arrived," said Sullivan County Sheriff Jeff Cassidy. "We're calling him a hero today."
The incident was called in at David A. Guy Dentistry at 9:47 a.m. The first Sullivan County Sheriff's Office deputy arrived to the scene, 150 Clinic Drive, six minutes later. Kingsport police and the Tennessee Highway Patrol also responded, with dozens of officers soon on the scene.
KINGSPORT — More than a dozen police officers have descended on a Colonial Heights medical office after a report of a Wednesday morning shooting.
The call came in before 10 a.m. from Clinic Drive. Thirty minutes later, investigators were gathering information on the incident to share with the media.
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