Booby Darin worked Robery Kennedy's 1968 presidential campaign. He was with Kennedy the day he traveled to Los Angeles on June 4, 1968 for the California Primary. Darin was at the Ambassador Hotel later that night when Kennedy was assassinated. Afterwards, Darin sold his house and most of his possessions and lived in seclusion in a trailer near Big Sur for nearly a year. Coming back to Los Angeles in 1969, Darin wrote "Simple Song of Freedom".