News Robert F. Kennedy’s granddaughter, Saoirse Kennedy Hill, died of accidental overdose November 1, 2019 Joey Garrison and Leora Arnowitz, USA TODAY Comments Off on Robert F. Kennedy’s granddaughter, Saoirse Kennedy Hill, died of accidental overdose Saoirse Kennedy Hill, the granddaughter of Robert F. Kennedy, died of an accidental overdose, her death certificate revealed, according to reports.