this time, he was just 55. here s linsey davis. reporter: another american family is demanding answers tonight, after yet another death in the dominican republic. 55-year-old joseph allen, a father from new jersey, found dead in his hotel room this past thursday. his sister tells abc news that her brother was, for the most part, healthy. allen is at least the ninth american tourist to die in the dominican republic in the last 12 months at different resorts across the island. the family of leyla cox, a 53-year-old radiologist from new york, is also asking questions. nobody can give me a solid answer on how she passed away. everything is being misdirected and mis-skewed. i get new information every single day. reporter: it was just two weeks ago when nathaniel holmes and cynthia day, seen here kayaking on the island, were both found dead in a d.r. resort. autopsies performed on the island said they died of respiratory failure and pulmonary edema. the husband of miranda werner says
the president. you can see george s full interview, president trump: 30 hours, sunday night at 8:00 p.m. on abc. and another death in the dominican republic. a mother from new york city found dead in her hotel room a day after her 53rd birthday. authorities believe she suffered a heart attack, and what her son is demanding tonight. here s gio benitez. reporter: tonight, the state department is monitoring yet another investigation of an american tourist who died in the dominican republic, and whose family is asking questions. just a day after her 53rd birthday, leyla cox, a radiologist from new york, died from what officials say was a heart attack. but her son claims she was healthy. it s been a nonstop nightmare just trying to get her body and her remains back, trying to get answers. reporter: this after at least eight american deaths in the last 12 months at different resorts across the island. families all around america asking questions. nobody can give me a solid answer