The Tennessee Bureau of Investigation said Saturday they were investigating an officer-involved shooting in Maryville.
Maryville Police Department officers arrived around 3:45 p.m at Old Niles Ferry Road near Cooper Road.
They found Matthew Daniel Johnston, 44, in the road with guns, authorities said.
The situation escalated and shots were fired, killing Johnston, the TBI said.
No other details were available.
The shooting comes the same day as a Back the Blue Walk, supporting first responders, was held in Maryville.
TBU agents are continuing to investigate.