A day after ruling out the previously believed cause of death for the youngest son of former New York Yankees outfielder Brett Gardner, who died after getting sick during a family vacation, investigators are looking into whether the 14-year-old may have had some allergic reaction to medicine,

Miller Gardner, the 14-year-old son of former Yankees outfielder Brett Gardner, died at a resort in Costa Rica during a family vacation, the U.S. Embassy of Costa Rica told Inside Edition.

The death of Miller Gardner, the 14-year-old son of former New York Yankees outfielder Brett Gardner, at a beach resort in Costa Rica is believed to be related to carbon monoxide inhalation, the Judicial Investigation Agency (OIJ) of the Central American country said Monday.

The former New York Yankees star's 14-year-old son, Miller Gardner, died on March 21 after falling ill on vacation in Costa Rica.