The two victims are the suspect's mother, Vi Lawhorn, and a friend.
East Ridge Police confirmed to WTVC that Mississippi Highway Patrol located Casey Lawhorn's vehicle in Jasper County, Mississippi, around 7 p.m. Sunday.
Casey Lawhorn was not in the vehicle, police said.
This comes after Casey's brother told WTVC that he had learned Casey was traveling southbound on I-59 through Mississippi.
The name of the friend has not yet been released as the next of kin has not been notified.
He is still believed to be driving a gold Ford Taurus with Tennessee license tag W0327L.
Casey Lawhorn is considered armed and dangerous.