Complex sentence: Staffordshire Chief Constable Captain Anson--an administrator without experience of investigatory police work--believed Edalji was the author of the letters, but had no involvement in the animal maimings due to his professional status.
Split into simpler sentences: Staffordshire Chief Constable Captain Anson was an administrator without experience of investigatory police work. He believed that Edalji was the author of the letters, but that he had no involvement in the animal maimings due to his professional status.