British version of pentobarbital, a sedative also used for euthanasia and lethal injection.

Drastically

Evil facial hair?

He purportedly called Nancy Slover from a phone booth...

He said he'd give his identity...

Peek a boo, you are doomed.

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

Suspect Arthur Leigh Allen

Suspect Ted Kaczynski?

A prophetic reference to a future sleuth.

Zodiac said he would blow up a school bus...

...with a blast...

...from a bomb.

Yes - we're still trying and failing.

"When I die I will be reborn in paradice."

"The Mt. Diablo Code concerns Radians & # inches along the radians"

No Mount Diablo, but a devil can still be found.

Possible victim Donna Lass.

He certainly is one.

Permitting the substitution for the gun target symbol, another misspelling of Zodiac can be found.

Another hidden Zodiac...

A neurotoxin with no antidote

More bomb obsession.

The Unabomber appears yet again.

So does Arthur Leigh Allen.

And even our pal Tom.

Macabre...

Avid surfer? Or a cop reference?

A Game of Thrones reference, long before its time.

Blaine Blaine tips his hand...

Zodiac's favorite opera.

Might explain his actions...

Two Zodiac references right off the bat.

Just can't get away from this guy...

...and his suspect.

Even Allen appears again.