Law enforcement officials in several Florida counties are looking for a man they said went to several car dealerships and test drove cars, but never returned them Wednesday.

Dealership employees think the suspect's first stop was in Gainesville, and wound up at Jerry Hamm Chevrolet in Jacksonville. Deputies said shortly after he took off, there was a 100 mile per hour chase through the Southside of Jacksonville. The driver eventually escaped police pursuit.

At about 2 p.m., employees at Atlantic Dodge on U.S. 1 South said a man test drove a 2012 Dodge Challenger but never returned. The car he left in the parking lot, a 2000 Pontiac Firebird, was taken from Sunset Auto on North Ponce Boulevard Wednesday morning, deputies said.

The man had to abandon one of the cars he stole on U.S. 1 because the OnStar device inside slowed it down to 20 miles per hour. Once that happened, he left the car and was on the road again to St. Augustine where he stole the Challenger.

Sunset Auto salesman Barry Clifford said the man didn't look like a crook.

"He said he was a doctor, had appointment, 65 years old, professional, well-dressed," Clifford said. "I don't know what the upside is. He's not making money from it. I don't know what he's doing."

The thief, a white man between 60 and 65 years old, told dealership employees that he was a doctor. He is between 5 feet 10 inches and 6 feet 1 inch tall. He has a receding hairline, salt-and-pepper colored hair and was wearing khaki shorts and a blue button-up shirt.

The last car he was seen driving, the Dodge Challenger, is dark blue with white racing stripes.

Anyone with information is asked to call the St. Johns County Sheriff’s Office 904-824-8304 or Crime Stoppers 888-277-TIPS (8477).