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THE MISSING RAINCOAT OF DONNA LASS?
There is now a decent amount of evidence to indicate Donna Ann Lass arrived home in the early hours of September 6th 1970 and was either murdered in, or abducted from her apartment shortly after...
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THE 340 MESSAGE IN THE Z13
When the Zodiac Killer mailed the 408 cipher on July 31st 1969 he claimed it would reveal his identity---and backed this up somewhat by stating in his August 4th 1969 "Debut" letter that when police...
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THE FOUR CIPHERS NOW HISTORY
A shift cipher with circled numbers (often seen in puzzles like escape rooms) relies on a Caesar cipher, where the secret shift key is represented by numbers wrapped inside circles, such as the three...
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PROVIDE EVIDENCE FOR A COPYCAT
VISIT DAVE'S WEBSITE On June 2nd 2026 David Oranchak completed his 3-part destruction of yet another hopeless and deranged offering, which this time attempted to link the Zodiac Killer with the Black...
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FREQUENCY ON THE 340 DIAGONALS
In an effort to confuse the decoders, the sender will somtimes place deliberate errors into ciphertext in a classic cryptographic technique known as nulls, trapdoors, or intentional noise, aimed at...
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BACK TO THE BEGINNING
SGT LUNDBLAD AT THE CRIME SCENE Virtually every communication the Zodiac Killer mailed had an inspiration that can be traced back to recent newspaper articles about him. The first letters mailed to the...
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DAVID TOSCHI TAKES THE APPLAUSE
Knowing that the Zodiac Killer was a narcissist who bathed in the spotlight of notoriety, it wasn't surprising that by 1974, after several of his communications failed to be published in the...
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THE TWO "CODE LETTERS" TO LYNCH
SGT JOHN LYNCH The "Good Citizen" letter mailed on October 7th 1969 was addressed to Sergeant John Lynch of the Vallejo Police Department, just like the "Concerned Citizen" card was on August 10th...
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THREE INNOCUOUS EXCLAMATION MARKS
The Zodiac Killer employed only two pseudonyms between 1969 and 1987 in the form of "Zodiac" and "Me"---the latter of which appeared in the only known genuine mailing of 1974, when the Zodiac Killer...
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"ZODIAC" THREAT ON PERES ELEMENTARY
San Francisco Chronicle, November 12th 1969 Beginning on October 23rd 1969 and culminating on November 5th 1969, Daniel Williams (24), a Salesian High School teacher in the city of Richmond received...
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JAPANESE SYMBOLISM IN "THE EXORCIST"
The opening line of the "Exorcist" letter mailed on January 29th 1974 borrowed from the newspaper coverage of the 1973 film which won four Golden Globe awards at the Beverly Hilton hotel in Beverly...
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TURNING FICTION INTO FACT, AND BACK
"The Most Dangerous Game" was released into US cinemas on September 16th 1932 following much publicity, with its associate producer Merian C. Cooper sought by the press to give comment on his latest...
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THE INSPIRATION FOR INGLESIDE
On October 13th 1969 the first wanted poster was released to the public concerning the murder of Paul Stine in Presidio Height two days earlier. On January 29th 1970, the Yellow Cab Company put up a...
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THE SCHOOL SHOOTING ON APRIL 18TH 1978
INSPECTOR DAVID TOSCHI Apart from the tragic murder of Paul Stine on October 11th 1969 in Presidio Heights, the overarching weight of Zodiac communications in San Francisco in late 1969 and 1970...
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FLASHLIGHT SHOOTER ADMISSION
On July 10th 2024 I wrote an article about Heidi Hoffman (16) and Lenny Parsons (19) who had parked their vehicle at the end of Saddle Road by Heavenly Valley in South Lake Tahoe on December 13th...
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"THE GIRL WHO WORKS IN THE HOSPITAL"
On April 15th 1971 the San Jose sheriff's office received an unsigned letter invoking the pseudonym of Zodiac and speaking of "another victim" and the "next victim". The Zodiac Killer letters - by and...
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COULD THIS MAN HAVE KILLED CHERI?
I will keep the following brief so you can watch the YouTube video presented by Detective Ken Mains on his channel Unsolved No More, who was contacted by Cindy Cannella, the sister of Gordon Mark...
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REVISED POSITION OF DONNA'S SKULL
On August 5th 1986, Deputy Lowell Carlton from the Placer County Sheriff’s Office described the skull location of Donna Lass as "Location: Interstate 80 to State Route 20 north, 3.5 miles to dirt road...
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THE POST-MORTEM INTERVAL OF BONES
Two skulls were found in the region of Lake Spaulding in 1986 and Deputy Lowell Carlton was integral to both investigations. The first skull was found on January 19th 1986 by Deputy Lowell Carlton...
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THE SKULL OF DONNA LASS FOUND BY BEAR VALLEY CAMPGROUND?
The death certificate of Donna Lass indicating the location of her skull reads "State Route 20, 3.5 miles north of Interstate 80 near Drum Canal Crossing, Emigrant Gap". However, this is somewhat in...
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