The FBI is involved in the investigation of the death of Brett Gardner's son Miller Gardner, Us Weekly can confirm. A source tells Us that the FBI is working in conjunction with Costa Rica's Judicial Investigation Department (OIJ) and the Costa Rican Fire Department.

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.

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.

The investigation into the death of New York Yankees baseball star Brett Gardner's 14-year old son is continuing.

The New York Yankees star’s 14-year-old son was found dead in his hotel room during the family’s vacation in Costa Rica.

Former Yankees player Brett and his wife, Jessica, announced last month that their teenage son, Miller, died on March 21. Here’s what we know about the cause of his death.

Brett Gardner's son Miller's cause of death has been confirmed by local authorities nearly two weeks after his death. Miller was in Costa Rica with family when he died on the morning of Friday, March 21.

Miller Gardner, the 14-year-old son of former New York Yankees outfielder Brett Gardner, is believed to have died as a result of carbon monoxide poisoning.