What would have died of Saoirse Kennedy Hill, the granddaughter of Robert F. Kennedy?

A granddaughter of Robert F. Kennedy, who was killed in 1968 during his presidential campaign, has died. Saoirse Kennedy Hill was 22 years old.

The Kennedy family confirmed the death in a statement on Thursday night after police visited a compound in Hyannis Port, Mbadachusetts after being informed of a possible drug overdose. The statement was published by Brian Wright O. Connor, spokesman for Saoirse Hill's uncle, former legislator Joseph P. Kennedy II.

Hill was the daughter of Courtney, the fifth son of Robert and Ethel Kennedy, and Paul Michael Hill, one of four falsely accused of the bomb attack perpetrated against the army of Ireland in two bars. The couple is already divorced.

"He lit up our lives with his love, his laugh and his generous spirit," the statement said.

Pbadionate about human rights and women's empowerment, she has worked with indigenous communities to build schools in Mexico, she added.

Hill had written frankly and publicly about his fight against mental illness and a suicide attempt in high school.

"My depression began at the beginning of my high school and will accompany me all my life," he wrote in a February 2016 column in the school newspaper. The Deerfield Rollof Deerfield Academy, the elite private school that he attended in western Mbadachusetts.

Robert F. Kennedy was shot in Los Angeles in 1968 after winning the California Democratic primary election. He served as Secretary of Justice during the reign of his brother, President John F. Kennedy, murdered in Dallas in 1963.

One of the 11 children that RFK had with Ethel Kennedy, Michael Kennedy died in a skiing accident in Aspen, Colorado in 1997 at the age of 39; and in 1984, another of his sons, David Anthony Kennedy, died of a drug overdose in Florida at the age of 28.

JFK's son, John F. Kennedy Jr., died with his wife and sister-in-law when his plane crashed near Martha's Vineyard, Mbadachusetts, in 1999.

Mark Pratt and William J. Kole | AP