It has led Rojo to leave the resort having not previously been aware of the death, reports The Sun.
At the same Hard Rock resort a year ago, another American man died under similar circumstances, the man's wife said. Kaylynn Knull, 29, and her boyfriend Tom Schwander, 33, said they were forced to cut their trip short because they fell seriously ill during their stay at the resort.
American tourist Bell Wallace became sick and urinated blood after having a single whisky from his room's minibar on April 11.
Corcoran said no autopsy has been done on her brother but she was told he suffered a heart attack. Five days later, a Maryland couple was found unresponsive in their rooms at a hotel on the same resort.
His death shares disturbing similarities to six other American tourists who have all passed away under mysterious circumstances on the island in the past year.
On May 25, 41-year-old Miranda Schaup-Werner from Pennysylvania died in her room at Grand Bahia Principe Hotel La Romana in Punta Cana.
Meanwhile, a DE woman named Tammy Lawrence-Daley said she was attacked in the Dominican Republic at another all-inclusive resort while she was vacationing with her husband and some friends.
Thirty members of the family took off for the Dominican Republic to be in place for Tickenoff's wedding on April 14.
The news of the recent deaths has drawn attention to earlier deaths of USA tourists at island resorts in the area, and some are now suspecting there may be a pattern.
"She was 51 years of age, relatively healthy, no reason for her to go on vacation and die so suddenly", Nieves told the station.
The Dominican Republic's prosecutor's office said forensics experts are performing toxicological and other tests to determine the causes of death of Holmes and Day.
The U.S. State Department released a statement to Fox News in response to questions about Wallace's death.