The agency identified the man as Richard D. Jenny, 39, no address given, and said that he is being treated for injuries at Wellmont Holston Valley Medical Center.
According to the TBI, two highway patrol officers initiated a traffic stop near mile marker 6 on Interstate 26 at approximately 8:40 p.m. Jenny was a passenger in the vehicle. Shortly after the stop was made, Jenny reportedly pulled a gun on the troopers, which resulted in shots being fired.
Three other people were in the vehicle at the time. One passenger received minor injuries and was treated and released Thursday night. Neither of the troopers was injured.
TBI agents and a team of forensic scientists worked through the night to gather evidence and conduct interviews. The agency is declining to identify the officers involved in the shooting at this time.
Sullivan County District Attorney General Barry Staubus asked the TBI to investigate the incident.
The westbound lanes of Interstate 26 were closed for most of the night and reopened at approximately 6 a.m. Friday.