Medical reports listed methadone, fluoxetine, norfluoxetine, diazepam, nordiazepam and alcohol in her system. The reported cause of death was "acute methadone and ethanol toxicity in combination with other prescription medications." Fentanyl was not included in those findings.
Following her death the family said they were devastated and praised her commitment to human rights and volunteer work, including helping build schools in Mexico. Relatives named include her mother Courtney, father Paul, stepmother Stephanie and grandmother Ethel. Cousin Michaela Kennedy Cuomo urged honoring Saoirse's compassion and advocacy.
RFK Jr. has remembered Saoirse as fierce and adventurous, noting her humor and the joy she brought to family and friends in reflections after her passing.