A CRIMINAL INVESTIGATION IS UNDERWAY FOLLOWING A DEADLY CRASH IN JOHNSON COUNTY LAST NIGHT. ACCORDING TO THE TENNESSEE HIGHWAY PATROL, A VEHICLE CROSSED THE CENTER LINE ON A ROAD ABOUT A MILE NORTH OF BUTLER ON HIGHWAY 67 AND STRUCK AN AMBULANCE. THE AMBULANCE RAN OFF THE ROADWAY AND OVERTURNED, KILLING A FEMALE PATIENT INSIDE AND LEAVING THREE OTHER PEOPLE INJURED. THE INJURED INCLUDE THE DRIVER OF THE CAR THAT STRUCK THE AMBULANCE, 51 YEAR OLD BRENDA J. BUCHANAN OF ELIZABETHTON. 55 YEAR OLD JOSEPH R. BARLOW OF MOUNTAIN CITY WAS THE AMBULANCE DRIVER. AND 32 YEAR OLD KEVIN COLSON WAS A PASSENGER IN THE AMBULANCE. THE NAME OF THE PATIENT IN THE AMBULANCE WHO DIED HAS NOT BEEN RELEASED. THE INJURED WERE ALL FLOWN TO A LOCAL HOSPITAL. THEIR CONDITIONS ARE NOT KNOWN AT THIS TIME. DRUGS ARE BELIEVED TO HAVE BEEN INVOLVED IN THE ACCIDENT.