He wondered why Tien and Nguyen , vacationing with friends , jumped off cruise ship . Time of the day was about 15 miles east of Mona ##gas , Puerto Rico . They went overboard near the end of a weeklong cruise .
FBI investigates why Tien Phuoc Nguyen , vacationing with family , jumped off cruise ship . Adventure of the Seas was about 15 miles east of Mona Island , Puerto Rico . Nguyen went overboard near the end of a weeklong cruise .