Just a few months after the apprehension of Karl Francis Werner for the murders of Kathie Ann Snoozy (15), Debra Gaye Furlong (14) and Kathy Bilek (18), who all suffered extensive stab wounds to their body, Janet Lynn Mallicoat (21), a San Jose State college senior, was stabbed approximately 130 times in her 63 Keyes Street office where she worked as a part-time receptionist for the Regal Map Company. She had then been set on fire with a flammable liquid and a pair of scissors were found protruding from her head. There was no evidence of sexual assault or robbery. Her employer, George Andrews had traveled to San Francisco on business leaving her alone in the office. Janet Mallicoat was murdered on Thursday August 26th 1971, exactly 44 days after the mailing of the Monticello card which claimed a connection to the Kathy Bilek murder and an inferred connection to the murders of Kathie Snoozy and Debra Furlong.
The Monticello card read "Near Monticello Shought Victims 21 ...... In The Woods Dies April". The 'Monticello' mentioned in the pasted card was a neighborhood containing the Oak Hill Funeral Home and Memorial Park, where Kathy Snoozy was laid to rest. See article. The Regal Map Company office was situated just 1.40 miles from the neighborhood of Monticello.
With the amount of stab wounds inflicted on the young woman, this crime drew parallels to the other three murders - but with Karl Francis Werner locked away, the possibility of a copycat emerged.
The San Jose Police Department, a target of a potential Zodiac correspondence on November 21st 1969, was situated 3 miles northwest of the 63 Keyes Street office The letter on November 21st 1969 (with accompanying code) was described in the FBI files: "after a cursory analysis, officers of the San Jose, California PD, believe widow in message may be Mrs (redacted), San Jose, California. San Jose PD instituting 24 hour surveillance on Mrs (redacted)".