Please answer the following question: Build a movie plot around this: What type of gun was fired? .44 Magnum
A:
A psychopathic serial killer calling himself "Scorpio" (Andy Robinson) shoots a young woman in a San Francisco swimming pool from a nearby rooftop. SFPD Inspector Harry Callahan (Clint Eastwood) finds a blackmail message demanding the city pay him $100,000 whilst also promising that for each day his demand is refused he will commit a murder; his next victim will be "a Catholic priest or a nigger." The chief of police and the mayor (John Vernon) assign the inspector to the case, despite his reputation for violent solutions.While in a local diner, Callahan observes a bank robbery in progress. He goes outside and kills two of the robbers while wounding a third. Callahan then challenges him:I know what you're thinking: 'Did he fire six shots or only five?' Well, to tell you the truth, in all this excitement, I've lost track myself. But being this is a .44 Magnum, the most powerful handgun in the world, and would blow your head clean off, you've got to ask yourself one question: 'Do I feel lucky?' Well, do you, punk?After the robber surrenders, he tells Callahan that he must know if the gun was still loaded. Callahan pulls the trigger with the weapon pointed directly at the robber, and laughs as it is revealed to be empty.Scorpio targets a gay black male, but is interrupted by a police helicopter and escapes. Later that night, Callahan and his rookie partner, Chico Gonzalez (Reni Santoni) pursue a likely suspect, but it turns out to be a false alarm. Following that, Callahan successfully halts a suicide attempt, after which he reveals that the origin of his nickname comes from the fact that he is given every dirty job to do.When Scorpio kills a young black boy from another rooftop, the police believe the killer will next pursue a Catholic priest. Callahan and Gonzalez, wait for Scorpio near a Catholic church, where a rooftop-to-rooftop shootout ensues, with Callahan attempting to snipe Scorpio with a rifle while Scorpio returns fire with a submachine gun. Scorpio escapes, killing a police officer...