Miller Gardner, the 14-year-old son of former New York Yankees player Brett Gardner, tragically passed away on March 21, 2025, during a family vacation in Costa Rica. A toxicology report released on April 2 confirmed that the cause of death was carbon monoxide inhalation, with authorities stating that the boy had a carboxyhemoglobin saturation level of 64%. This level is alarmingly high, as concentrations above 50% are considered lethal.
The Gardner family was staying at the Arenas Del Mar Beachfront & Rainforest Resort when Miller fell ill. According to Randall Zúñiga, director of Costa Rica’s Judicial Investigation Agency, the family’s hotel room was found to have “high levels” of carbon monoxide contamination. Two days prior to the toxicology report, officials revealed that tests indicated carbon monoxide levels in the room were as high as 600 parts per million.
In a statement, Zúñiga noted, “The toxicology results are in, and the carboxyhemoglobin test found a saturation of 64%. Concentrations above 50% are already lethal.” He added that the investigation into Miller’s death was now closed, confirming the police’s hypothesis that carbon monoxide exposure was the cause.
Initially, there were various theories about Miller’s sudden death. Some speculated that he might have died from asphyxiation due to choking on vomit, but this was ruled out when it was determined that there was no obstruction in his windpipe. Instead, the investigation focused on the possibility of carbon monoxide poisoning, especially given that the family had been staying adjacent to a mechanical room at the resort.
However, the Arenas Del Mar Beachfront & Rainforest Resort disputed the findings. They claimed that the high carbon monoxide levels were found in the mechanical room, which guests do not occupy, and that the levels in the Gardner’s hotel room were “non-existent and non-lethal.” A spokesperson for the resort stated, “There was an error in this initial reporting.”
In the wake of Miller’s death, Brett and Jessica Gardner expressed their profound grief in an obituary, stating, “The void Miller’s passing leaves in the hearts of his family, friends, teammates, teachers, coaches, and others will be felt for years.” The family described his time on earth as brief but impactful, emphasizing that his spirit would continue to inspire those who knew him.
Dr. Kevin Gannon, who was involved in the emergency response, noted that when first responders arrived, Miller had already lost vital signs. They performed advanced life support CPR for approximately 30 minutes before he was declared dead. “We responded to a patient without vital signs,” Gannon explained.
The tragic incident has raised questions about safety standards at the resort. Following the announcement of Miller’s death, the hotel reportedly lowered its prices, with top-end rooms now listed for $998 per night, down from $1,300.
In addition to the family's loss, the investigation has drawn attention to the potential for hazardous conditions in hotels, especially those that are situated near mechanical or service areas. Zúñiga highlighted the importance of safety protocols, stating, “Our priority remains the safety and well-being of our guests and staff.”
The Gardners had been vacationing in Costa Rica when several family members fell ill with severe stomach cramps, vomiting, and diarrhea, symptoms that were initially thought to be food poisoning. However, the investigation has since shifted focus to the environmental conditions in their hotel room.
In their obituary, the Gardner family requested that donations be made to the Make-A-Wish Foundation in memory of Miller, reflecting their desire to help other children create joyful memories, just as Miller had during his short life.
The family’s grief is compounded by the uncertainty surrounding the events leading to Miller’s death. Despite the toxicology report confirming carbon monoxide poisoning, the resort’s denial of responsibility has left lingering questions about accountability and safety in hospitality environments.
As the Gardners navigate this unimaginable loss, they have also expressed a commitment to honoring Miller’s legacy. “Miller was so blessed with experiences and friendships in his 14 years, and he would want other children to have the opportunity to create their own wonderful memories,” they stated.
The investigation into Miller’s death serves as a stark reminder of the potential dangers that can lurk in seemingly safe environments. As the family prepares for a private celebration of life for Miller, the community reflects on the impact of his brief but meaningful life.
In the wake of this tragedy, it is hoped that increased awareness will lead to improved safety measures in hotels and resorts, ensuring that no other family has to endure such a devastating loss.
Miller Gardner’s story, while filled with sorrow, also highlights the importance of vigilance and safety in our everyday surroundings. As the Gardners cherish the memories of their son, they also advocate for a future where safety is paramount, and families can enjoy their vacations without fear.
