A medical examination has determined Saoirse Kennedy Hill’s ause of death, three months after she was found unresponsive at the family’s Cape Cod compound.

According to a death certificate obtained by WCVB-5, Hill died of an accidental overdose of alcohol, methadone, and a variety of prescription pills. In addition to the methadone, which is used to treat opioid dependency, the 22-year-old woman had fluoxetine, norfluoxetine, diazepam, amd nordiazepam in her system.

As the New York Post notes, diazepam is used to treat anxiety while fluoxetine is an antidepressant.

As CrimeOnline previously reported, Hill was a Boston College student and had just finished a term paper for school the day before she died. To celebrate, she went for a night on the town with a friend, before coming back to the compound where she and the friend stayed up until the early hours of the morning.

Hill had been open about her battle with depression, but sources close to her and the family said following her death that she had no known substance abuse issues.

Hill was the granddaughter of Robert and Ethel Kennedy.

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