Costa Rica authorities confirmed that carbon monoxide poisoning was the cause of death of Miller Gardner, the 14-year-old son of former New York Yankees outfielder Brett Gardner.

Miller Gardner ‘s cause of death has been confirmed by Costa Rica authorities. The 14-year-old son of former New York Yankees star Brett Gardner died of exposure to poisonous gases including carbon monoxide poisoning, Us Weekly confirmed on Wednesday, April 2.

After Miller Gardner’s suspected cause of death was updated to carbon monoxide poisoning, the Costa Rica resort where the Gardner family had been staying issued a statement.