Dirty Harry local and federal police committing offences and overstepping their authority by entrapment and obstruction of justice. Author McGilligan, argued that America needed a hero, a winner at a time when the authorities were losing the battle against crime. The box-office success of "Dirty Harry" led to the production of four sequels. In the 2007 film "Zodiac", also set in San Francisco and inspired by the Zodiac Killer, cartoonist Robert Graysmith approaches police detective Dave Toschi at the cinema, where he is watching "Dirty Harry" with his wife. When Graysmith tells Toschi he is going to catch the Zodiac killer, Toschi
Dirty Harry Impact" in 1983 (directed by Eastwood himself) and "The Dead Pool" in 1988. In 2012, the film was selected for preservation in the National Film Registry by the Library of Congress for being "culturally, historically, and aesthetically significant". A killer (Andrew Robinson) shoots a girl in a hotel rooftop swimming pool. Police arrive at the crime scene, where SFPD Inspector Harry Callahan (Clint Eastwood) finds a blackmail note signed "Scorpio" ordering the city to pay $100,000 or he will continue to kill. The mayor (John Vernon) asks police officers what is being done to track the killer. During lunch, Inspector