Sixteen months before the Pines postcard was mailed, during several weeks in November 1969, somebody claiming to be the Zodiac Killer telephoned school bus threats to Incline Village and Tahoe City, mobilizing deputies to patrol schools and bus routes in the area. There may have been a fair number of hoax Zodiac calls throughout the years, but this person claimed to be the Zodiac Killer and threatened Incline Village by Lake Tahoe, nearly 1 1/2 years prior to the mailing of the Pines postcard which contained an advertisement of Incline Village. I found the following newspaper article entitled "Phone Call Puts Guards Along Tahoe Bus Routes" in the Sacramento Bee, dated November 24th 1969 (see below).
In a seemingly unprovoked attack, Hoffman was struck by 40 pellets, with Parsons being hit 7 times. Officers would later retrieve 12-guage shells from the road. Both victims would survive the attack, but were unable to offer a reason why they may have been targeted. View newspaper article from the Sacramento Bee on December 15th 1969.