JOHNSON CITY, Tenn. -- Federal agents are trying to determine why a man pulled over for speeding in Tennessee was carrying a cache of weapons including two submachine guns and 900 rounds of ammunition.
Deputies found Scott Edmisten, 43, of Johnson City, carrying a .357-caliber Magnum, a loaded .45-caliber semi-automatic, a .223-caliber fully automatic assault rifle, a .308-caliber fully automatic assault rifle, more than 900 rounds of ammunition, and survival equipment, Washington County Sheriff Ed Graybeal said.
Graybeal asked the U.S. Bureau of Alcohol, Tobacco and Firearms to help investigate, since the automatic weapons aren't registered and lack serial numbers. He told CBS affiliate WJHL that Edmisten had apparently modified the AR rifles to make them automatics.
"Anytime you have several firearms and several hundred rounds of ammunition in a vehicle, that always causes a concern," said Michael Knight, an ATF spokesman.
Authorities still haven't determined why Edmisten was carrying all that firepower, but they "don't see a connection" to recent mass shootings, Knight said.
Read the full story at CBS News.