Robert Graysmith: It's ok... Avery has a gun.
Robert Graysmith: Just because you can't prove it doesn't mean it isn't true.
Dave Toschi: Easy, Dirty Harry.
Robert Graysmith: We met at the movies once.
Dave Toschi: I'm sure it was magical.
Robert Graysmith: I... I Need to know who he is. I... I need to stand there, I need to look him in the eye and I need to know that it's him.
Officer George Bawart: Who was that?
Sgt. Jack Mulanax: That's Graysmith. He's a cartoonist. He thinks he's going to solve the Zodiac.
Officer George Bawart: Well, good for him.
Zodiac 3: Before I kill you, I'm going to throw your baby out the window.
Arthur Leigh Allen: Oh. "The Most Dangerous Game."
Inspector William Armstrong: What?
Arthur Leigh Allen: "The Most Dangerous Game." That's why you're here isn't it? It was my favorite book in high school. It's about this man who waits for these people to get shipwrecked on this island. Because he was tired of hunting animals, he hunted the people for the challenge.
Dave Toschi: And man is the most dangerous animal of all?
Arthur Leigh Allen: That's the whole point of the story.
Dave Toschi: Hey, how do we know that this lead is real?
Inspector William Armstrong: It's very real. How do I know? Because I saw it on TV.
Arthur Leigh Allen: Can I help you?
Robert Graysmith: No.
Paul Avery: Methinks our friend's a tad bit fuckered in the head.
Melvin Belli: Inspector, he sent this letter directly to my residence, since he couldn't get through to me here or on the Dunbar show.
Dave Toschi: He tried to contact you here?
Melvin Belli: Once, I was out. He spoke with my housekeeper. He didn't leave a number.
Inspector William Armstrong: Yeah, he's kinda crafty like that.
"Suspect": I'm the Zodiac.
Inspector William Armstrong: And how did you kill your victims?
"Suspect": With a gun. No... with a hammer.