Carla Walker was just 17 years old when she was torn from her boyfriend's car and killed in a brutal crime that would go unsolved for 46 years. Her boyfriend, high school starting quarterback Rodney McCoy, told police a man with a gun yanked Walker from the passenger seat, then beat his head with the pistol until he passed out. Her body was found three days later. Now, Fort Worth detectives say they have arrested a suspect in the cold case. Inside Edition Digital’s Leigh Scheps has more. #InsideEdition