Short profile

[Jeeves]

Zodiac killer was not one person alone.

There was a group of ultimate thrill seakers,
or something like that.
The leader of this group possibly didnt kill anyone,
but sent the letters and told when to kill and where.

Similarty to Charles Manson case.

Every murder of this case is different,
only thing what connects them is that
murderers knew each other.

Its very likely, that at least one of them or all been
as a suspect.

[Jeeves]

A man is shoting with His new revolver,
He misses the target and knows that He has
to train a lot.
He gets good advices from an war veteran,
and target starts to get more hits.
Soon there are feve man talking about their guns,
they starts to get friends to each others.
Some days later...
Some one ask the war veteran an innocent question,
"How does it feel to kill some one"
Veteran:"Well, shoting with the rifle, its more like,
its You or Me, I like My self more, heh heh"
Veteran:"But to kill some one at close range with knife or
revolver, thats something...thats something that no army training,
can prepare to...hardest is the first one..."
Veteran:"But to answer the question, I have no word for that feeling,
I suppose every one feels different, in that situation"
Time goes by...
"You nearly always get cought when You kill some one."
"Have You heard about these two men, who meet for the first time on a train
and decided to kill each others wife, well they got busted"
One of them starts to smile and says,
"But what if there would be like three persons, and one Mister X,
who doesnt even exist, takes the the blame, and further on, when one kills,
other ones makes sure they have a good alibi"
Moment of silence...
"So if there is a vitnes, that is only complicating the investigation..."

[Jeeves]

Arthur Leigh Allen, might have been one of the Z-killers,
but He seems too good as a suspect, that most likely,
one of Z-killer had been a student in the same school.
Most likely student was male, righthanded, has dark hair,
and lived more than 9min bus drive away from the school.
Most likely Allen was a scapegoat or investigators was
convinced that Zodiac was a one person and therefore failed.

[Rupert]

I have no doubt it was Arthur Leigh Allen.

I have read enough to come to that conclusion.

It is sad that he was a promising high school athlete and bright fella.
He could have really been someone.

[FairM]

my profile of the killer is that he envyed those that he killed, he wanted to be in a loving relationship with a woman, he wanted to be secure and loved but for what ever reason he wasn't getting that, this was envy syndrome plain and simple, the man was angry beyond belief and it was because he wasn't loved.

he may have been dumped by a lover.
imho