Wallace is the fourth American tourist reported dead in the Dominican Republic in the last two months and the Federal Bureau of Investigation confirmed Friday to Fox News that it is stepping in to investigate the string of mysterious deaths.
A bottle of scotch from the minibar in his room at the Hard Rock Hotel and Casino in Punta Cana seems to be where Wallace's decline started.
Thirty members of the family took off for the Dominican Republic to be in place for Tickenoff's wedding on April 14.
Wallace's family says he was in good health before the trip and became concerned after seeing the alarming number of deaths at resorts in the Dominican in the month of May.
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. The other three all died at sister resorts that are less than a mile apart from each other.
Despite more tourists canceling their vacation plans to the island and various theories as to what is causing the deaths, Dominican Republic Tourism Minister Francisco Garcia insisted at a press conference last week that the country had received more than 30 million visitors in the last five years without any widespread concerns about health issues at its resorts.
On Monday, travel expert Mark Murphy appeared on Fox News to discuss the latest incidents and provide some perspective for American travelers ahead of summer vacation.
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According to Arnold, a hotel doctor had checked on Wallace and decided he needed to be hospitalized on April 13. 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. "We don't want this to happen to anyone else".
Authorities said Harrison died from a heart attack, but his widow, Dawn McCoy, told Inside Edition that her husband was a very healthy person and said she's not convinced. Day also suffered a cerebral edema.
Awilda Montes, from New York, US, believes the 7-Up she drank at the Luxury Bahia Principe Bouganville resort, in the Dominican Republic, contained bleach.
The resorts said they are cooperating with authorities. "We have some reporters on the ground that are assisting us in gathering information that might be available", he told AFP.
The bodies of a Maryland couple found dead in their hotel room in the Dominican Republic have been brought back to the United States.
The FBI is now investigating the recent outbreaks.