AUGUSTA — A federal law enforcement officer from Vermont was arrested in West Gardiner on Wednesday after allegedly aiming a loaded handgun at another vehicle on Interstate 95. Maine State Police officers arrested Demitria Buhalis, 41, of Brownsville, Vermont, and charged her with aggravated criminal threatening with a dangerous weapon, a Class C felony, said Lt. Aaron Hayden. Buhalis is a police officer at the White River Junction VA Medical Center in Vermont, Hayden said. Hayden said a man driving south on I-95 in Sidney called police just before noon to report that a woman who drove past him in...