Everything in the letter already appears in the article.

Yep. And he's done it before. [pulls out a newspaper article] Officer Richard Raditech, shot sitting in a parked car.

Zodiac claimed he shot someone in their car.

Yeah, a couple days after this article came out. Zodiac didn't do it, but he took credit for it anyway, because he's in it for the press.

How can someone who's killed thirteen people …

He claims he killed thirteen people, but which ones can we actually confirm? There's three in Vallejo, one in Berryessa, the cabbie, that's it.

[Graysmith looks confused]

Bobby, you almost look disappointed.