A Gainesville man pleaded not guilty Wednesday to vehicular homicide in the second degree connected to a fatal wreck almost one year ago in North Hall County. Micah James Mills, 22, son of former state Rep. James Mills, is accused of crossing over the center lane at about 8:20 a.m. Oct. 1 while traveling north on Thompson Bridge Road at Price Road. Mills’ 2006 Toyota Tundra struck a 1996 Ford Mustang, killing its driver, Steven Kyle Martin, 22, of Dahlonega.