Evidence recovered at the scene led investigators to that determination, said Peter O'Connor, assistant special agent in charge at the Louisville office of the Bureau of Alcohol, Tobacco, Firearms and Explosives. O'Connor declined to comment Monday on what kind of evidence had been recovered.
He said an investigation into the Dec. 16 blaze was continuing and evidence was being examined at an ATF fire research lab.
The blaze caused more than $1 million in damages to the Herb Jones Jeep dealership. Vehicles on the lot were not damaged and no one was injured.
Radcliff Fire Chief Rick Ledford has said the fire started in the shop area at the rear of the building.
Hours before the dealership burned down, employees were told they were out of jobs because the owners were selling the business.
The dealership was in the process of selling its Hardin County Jeep franchise to the Swope family of dealerships.
Mark Jones, general manager of the Jeep dealership, said the deal was almost final so the company decided to take the next step _ closing the business and laying off employees.
