Authorities in Costa Rica have released the official cause of death for New York Yankees player Brett Gardner’s 14-year-old son, Miller, the Associated Press reported. On Wednesday, April 2, it was ruled that Gardner’s son passed away due to exposure to carbon monoxide.

Miller Gardner, the youngest son of former New York Yankees outfielder Brett Gardner, died at the age of 14 while on vacation with his family.

Miller, 14, died on the morning of Friday, March 21, while on a family trip in Costa Rica, the Yankees previously announced

The family of former New York Yankees hero Brett Gardner released an obituary for their son, who died on a vacation to Costa Rica.