Original sentence: political scandal in which a staff member and certain political appointees of New Jersey Governor Chris Christie allegedly  conspired to create traffic jams in Fort Lee, New Jersey, by closing local lanes at an eastbound upper-level toll plaza entrance to the George Washington Bridge
Edited sentence: political scandal in which a staff member and certain political appointees of New Jersey Governor Chris Christie were shown to have conspired to create traffic jams in Fort Lee, New Jersey, by closing local lanes at an eastbound upper-level toll plaza entrance to the George Washington Bridge