On November 21st 1969 a letter and code from the alleged Zodiac was mailed to the San Jose Police Department threatening a widow. Police responded by implementing 24 hour surveillance on her residence.
Ten days later, on December 1st 1969, Elaine Davis (17), a Pleasant Hill High School senior disappeared from her 158 Pioneer Avenue home in Walnut Creek. The abductor had likely traveled through San Jose to dispose of her body at Light House Point in Santa Cruz.
On Sunday, April 11th 1971, Kathy Bilek, 18, visited Villa Montalvo, in Saratoga, with the intent to read and engage in birdwatching in the seclusion of a remote, wooded portion of the park, near a small stream. Her body was found the next day by her father, Charles, while Santa Clara County Sheriff's deputies searched nearby. She had been stabbed 17 times in the back, and 32 times in her chest and stomach, although her killer had taken care to avoid stabbing her breasts. Her murder was also attributed to Karl Francis Werner. Wikipedia. The brutal murder of Kathy Bilek would again be claimed by 'Zodiac', not only in the Monticello card, but in another alleged Zodiac letter, also mailed to the San Francisco Chronicle at about the same time as the Monticello card. Kathy Bilek was murdered in "April", exactly as mentioned in the Monticello card, and "in the woods" at Villa Montalvo (a wooded section of the park). Saratoga is a city in Santa Clara County, California, United States. It is located on the west side of the Santa Clara Valley, directly west of San Jose, The appearance of San Jose once again.
However, the "Monticello" the author is referring to in the pasted card, is again in San Jose. Monticello is a neighborhood in San Jose, California, just over 9 miles east of Villa Montalvo, the site of Kathy Bilek's murder.
In other words, the author of the card was saying "I killed Kathy Bilek near Monticello, in the Villa Montalvo woods in April".
To view the proximity of Monticello to Villa Montalvo click here.
This wasn't the only communication to refer to the murder of Kathy Bilek.
Sometime in 1971, likely just after the mailing of the Monticello card, a questionable Zodiac correspondence and cipher was received by the San Francisco Chronicle, postmarked Fairfield, California. It read:
I'll DO IT TO BECAUSE I DONE IT 21 TIMES. I CAN'T STOP BECAUSE EACH ThAT I KILL MAKES IT WORSE AND I MUST KILL MORE. MAN IS ThE MOST PRIZED GAME. ILL NERVER GIVE MY NAME BECAUSE YOU dONT UNDERSTAND. NEXT TIME I WILL SEND A PATCH OF HUMAN SKIN if their is SOME Left OVER.
The Monticello card stated "Shought victims 21", referring to the Kathy Bilek murder, whereas, in this correspondence the author was claiming he had already "done it 21 times." The Monticello card was never released to the newspapers or public, so bearing in mind these two communications were both likely mailed at approximately the same time, there is a high probability they were mailed by the same author - or Zodiac himself.
"I killed Kathy Bilek near Monticello, in the Villa Montalvo woods in April".
"Near Monticello Shought Victims 21 ...... In The Woods Dies April".