The Zodiac Killer is a serial killer who operated in Northern California in the late 1960s. His identity remains unknown. The Zodiac coined his name in a series of taunting letters he sent to the press. His letters included four cryptograms (or ciphers), three of which have yet to be solved.

The Zodiac murdered five known victims between December 1968 and October 1969. Four men and three women between the ages of 16 and 29 were targeted. Others have also been suspected to be Zodiac victims, although inconclusively. The lack of agreement about the number of victims, the incapacity of law enforcement to crack the ciphers, and the fact that several people have inconclusively been portrayed as “persons of interest” or possible suspects, has brought out this case’s designation as a perfect crime.

In April 2004, the San Francisco Police Department marked the case “inactive”, but reopened it some time before March 2007. The case remains open in other jurisdictions as well.

As per one of the letter that he sent to the editor

“This is the zodiac speaking up to the end of Oct I have killed 7 people. I have grown rather angry about the police for their telling lies about me. So I shall change the way I collect my slaves. I shall no longer announce to anyone. When I commit my murders they shall look like routine robberies, killings of anger & a few fake accidents etc

The police shall never catch me because; I have been too clever for them.
1 I look like the description passed out only when I do my thing, the rest of the time I look entirle different. I shall not tell you what my descise consists of when I kill

2 As of yet I have left no fingerprints behind me contrary to what the police say in my killings I wear transparent fingertip guards. All it is is 2 coats of airplane cement coated on my fingertips — quite unnoticible + very efective

3 my killing tools have been boughten through the mail order outfits before the ban went into efect. Except one & it was bought out of the state. So as you can see the police don’t have much to work on. If you wonder why I was wipeing the cab down I was leaving fake clews for the police to run all over town with, as one might say, I gave the cops som bussy work to do to keep them happy. I enjoy needling the blue pigs. Hey blue pig I was in the park — you were useing fire trucks to mask the sound of your cruzeing prowl cars. The dogs never came with in 2 blocks of me + they were to the west + there was only 2 groups of parking about 10 min apart then the motor cicles went by about 150 ft away going from south to north west

p.s. 2 cops pulled a goof abot 3 min after I left the cab. I was walking down the hill to the park when this cop car pulled up + one of them called me over + asked if I saw anyone acting suspicious or strange in the last 5 to 10 min + I said yes there was this man who was runnig by waveing a gun & the cops peeled rubber + went around the corner as I directed them + I disappeared into the park a block + a half away never to be seen again. [This section has been marked off with the note “must print in paper.”]

Hey pig doesnt it rile you up to have your noze rubed in your booboos?

If you cops think I’m going to take on a bus the way I stated I was, you deserve to have holes in your heads. Take one bag of ammonium nitrate fertilizer + 1 gal of stove oil & dump a few bags of gravel on top + then set the shit off + will positivily ventalate any thing that should be in the way of the blast.

The death machine is all ready made. I would have sent you pictures but you would be nasty enough to trace them back to developer + then to me, so I shall describe my masterpiece to you. The nice part of it is all the parts can be bought on the open market with no questions asked.

1 bat. Pow clock — will run for aprox 1 year
1 photoelectric switch
2 copper leaf springs
2 6V car bat
1 flash light bulb + reflector
1 mirror
2 18″ cardboard tubes black with shoe polish inside + oute

the system checks out from one end to the other in my tests. What you do not know is whether the death machine is at the sight or whether it is being stored in my basement for future use. I think you do not have the manpower to stop this one by continually searching the road sides looking for this thing. + it wont do to re roat + re schedule the busses because the bomb can be adapted to new conditions.
[Here the Zodiac’s crossed-circle has been modified with five Xs drawn along the symbol’s left side]
Have fun!! By the way it could be rather messy if you try to bluff me.
PS. Be shure to print the part I marked out on page 3 or I shall do my thing.

To prove that I am the Zodiac, Ask the Vallejo cop about my electric gun sight which I used to start my collecting of slaves.
Influences:
Heriberto “Eddie” Seda (born July 31, 1967) is a serial killer who struck New York City from 1990 to 1994. Before being caught on June 18, 1996, Seda killed three people and critically wounded four. Seda is believed to have admired San Francisco’s Zodiac Killer for avoiding capture. In 1998, Seda was convicted and sentenced to 235 years imprisonment..

A detailed note on The Zodiac Killer could be found at The Zodiac Killer