Complex sentence: The length of the box has thrown into question whether Scott had ever been buried at that site as he was 6 feet 2 inches tall and would not have fit into this make-shift coffin which, had been said to have been nailed shut.
Split into simpler sentences: The length of the box has thrown into question whether Scott had ever been buried at that site. He was 6 feet, 2 inches tall and would not have fit into this make-shift coffin which had been said to have been nailed shut.