The Day of the Dolphin originally going to be directed by Roman Polanski for United Artists in 1969, with Polanski writing the script. However, while Polanski was in London, England, looking for filming locations in August 1969, his pregnant wife, the actress Sharon Tate, was murdered in their Beverly Hills home by disciples of Charles Manson. Polanski returned to the United States and abandoned the project. The following year it was announced Franklin Schaffner would make the movie for the Mirisch Corporation. These plans were frustrated and Joseph Levine ended up buying the project from United Artists for Mike Nichols. The film was mostly shot
Charles Manson announced that the imprisoned Manson was engaged to 26-year-old Afton Elaine "Star" Burton and had obtained a marriage license on November 7. Manson personally dubbed Burton with the name "Star". She had been visiting Manson in prison for at least nine years, and maintained several websites that proclaimed his innocence. The wedding license expired on February 5, 2015, without a marriage ceremony taking place. It was later reported, according to journalist Daniel Simone, the wedding was cancelled after it was discovered Burton only wanted to marry Manson so she and a friend, Craig "Gray Wolf" Hammond, could use his corpse