Officials said in April that the death of Brett Gardner's 14-year-old son, Miller, was caused by carbon monoxide, but authorities are reportedly still investigating whether it was a homicide.
The Gardner family announced Miller's death on March 23, two days after he had died. Officials ruled the cause of death on April 3 after they investigated both food poisoning and asphyxiation.
However, according to ESPN, a spokesperson for the Costa Rican prosecutor's office handling the case said the case remains under investigation, and prosecutors are still determining if the death will be ruled a homicide.