The three short videos are shaky, a jumble of blurred images and muffled sound, giving the distinct impression they were shot surreptitiously. They show three people, two men in leather jackets and a woman wearing an elegant red coat, in the lobby of Credit Suisse Group AG’s Zurich headquarters. The person taking the videos is also a man, also in a leather jacket; his arm flashes on screen here and there. The men are from the Dominican Republic; the woman, a Swiss citizen of Dominican descent, is their translator. It’s fall 2017.