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In June 1968, US presidential candidate Robert F Kennedy was assassinated shortly after addressing his supporters at the Ambassador Hotel in Los Angeles. It was less than five years after his older brother, President John F Kennedy, had also been assassinated. Sirhan Sirhan was convicted of the crime, but many - including Kennedy's friend Paul Schrade - suspect a second gunman was involved. Schrade was shot himself that night and he told Rebecca Kesby about why he\\u2019s campaigning for the case to be reopened.

PHOTO: Robert Kennedy speaking at the Ambassador Hotel shortly before his assassination (Getty Images)