April 20, 1970 - San Francisco Chronicle

Mailed: April 20, 1970

Postmarked: San Francisco, California

Sent to: San Francisco Chronicle

Written on: 

This is the Zodiac speaking 

By the way have you cracked 

the last cipher I sent you? 

My name is - 

AEN*@K@M@[NAM 

I am mildly cerous as to how 

much money you have on my 

head now. I hope you do not 

think that I was the one 

who wiped out that blue 

meannie with a bomb at the 

cop station. Even though I talked 

about killing school children with 

one. It just wouldnt doo to 

move in on someone elses teritory. 

But there is more glory in killing 

a cop then a cid because a cop 

can shoot back. I have killed 

ten people to date. It would 

have been a lot more except 

that my bus bomb was a dud. 

I was swamped out by the 

rain we had a while back.

(End of 1st page)

The new bomb is set up like

this

(bomb drawing / diagram)

A + B are photo electric

swiches when sun beam

is broken A closes circuit

is broken B opens circuit

which makes B the

cloudy day discon-

ect so the bomb

wont go off by accid.

PS I hope you have fun trying

to figgure out who I killed

(Crosshair with =10) SFPD=0

Image Source: https://www.zodiackiller.com/MyNameIsLetter.html

Image Source: https://www.zodiackiller.com/Bomb2.html

Image Source: https://www.zodiackiller.com/MyNameIsEnvelope.html