Is there a best witness for identifying Oswald as Tippit's killer?
Ted Callaway is unimpeachable. He saw Oswald running with a gun from the immediate vicinity of the shooting.
Helen Markham will identify Lee Oswald as the man she saw shoot Tippit.
William Scoggins will identify Lee Oswald as the man he saw talking to Tippit and then after hearing shots, saw Oswald run straight towards his location with a gun and cut across the yard on the corner.
Barbara Davis will identify Lee Oswald as the man she saw cut across her front yard (coming from the area of Tippit's patrol car) with a gun in his hands moments after hearing shots.
Virginia Davis will identify Lee Oswald as the man she saw cut across the front yard (coming from the area of Tippit's patrol car) with a gun in his hands moments after hearing shots.
Ted Callaway will identify Lee Oswald as the man he saw turn the corner at Tenth and Patton and run down Patton towards Jefferson with a gun in his hands just moments after hearing the shots.
Sam Guinyard will identify Lee Oswald as the man he saw turn the corner at Tenth and Patton and run down Patton towards Jefferson with a gun in his hands just moments after hearing the shots.
Warren Reynolds will identify Lee Oswald as the man he saw run down Patton towards Jefferson with a gun in his hands just moments after hearing the shots.
L.J. Lewis will identify Lee Oswald as the man he saw run down Patton towards Jefferson with a gun in his hands just moments after hearing the shots.
Harold Russell will identify Lee Oswald as the man he saw run down Patton towards Jefferson with a gun in his hands just moments after hearing the shots.
Therefore, when you use your brain (unlike Iacoletti is doing) and piece it together, the Davis women, Callaway, Guinyard, Reynolds, Patterson and Russell most definitely saw Tippit's killer (since they saw the same man seen by Markham and Scoggins).
One does not have to be staring at the gunman at the instant the shots were fired in order to see the killer.