Paul Avery: Do you know more people die in the East Bay commute every three months than that idiot ever killed? He offed a few citizens, wrote a few letters, then faded into footnote... Not that I haven't been sitting here idly, waiting for you to drop by and reinvigorate my sense of purpose.
"Suspect": I'm the Zodiac.
Inspector William Armstrong: And how did you kill your victims?
"Suspect": With a gun. No... with a hammer.
Robert Graysmith: This is a case that's covered both northern and southern California with victims and suspects spread over hundreds of miles, would you agree?
Dave Toschi: Yeah.
Robert Graysmith: Darlene Ferrin worked at the Vallejo House of Pancakes on Tenneessee St. Arthur Leigh Allen lived in his mother's basement on Fresno St. Door to door, that is less than 50 yards.
Dave Toschi: Is that true?
Robert Graysmith: I've walked it.
Dave Toschi: Jesus Christ.
Chosen answer: Scorpio is loosely based on the Zodiac killer, yes. However, "Zodiac" is made to portray the hunt for the real-life Zodiac killer (as accurately as possible), with only a few ficticious elements thrown in for the sake of story-telling, while "Dirty Harry" is pure fiction.
Twotall