US presidential candidate Robert F Kennedy was murdered in June 1968. It was less than five years after his older brother, President John F Kennedy, was also assassinated.

Sirhan Sirhan was convicted of the crime, but many - including Kennedy's friend Paul Schrade - suspect another gunman was involved.

Schrade was also shot that night and he’s been telling Witness History why he’s campaigning for the case to be reopened.

Witness History: The stories of our times told by the people who were there.

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