On the day of his arrest in a massive money-laundering scheme that still sours relations between the United States and Turkey, Reza Zarrab was consumed by his true passion: the sea. “I will book myself a hire car at the airport to take all scuba equipment and I’ll find a hotel near yours,” Adam Wood, his then-divemaster and asset manager said in a WhatsApp message sent March 19, 2016, as the two were about to depart for Florida.