One person was killed following a series of crashes on Interstate 75 in Madison County. Kentucky State Police said two vehicles were involved in separate crashes near the 86-mile marker a little before 4 a.m. on Friday. One of the drivers exited his vehicle to check on something. He was then hit by a third vehicle and killed. The Madison County coroner has identified the victim as 58-year-old Robert Hepler, of Johnson City, Tenn.