One major story about the Zodiac Killer broke in the San Francisco Chronicle on November 16th 1970 about the connection to the Riverside murder of Cheri Jo Bates in 1966. Four months would elapse between this story and the mailing of the Los Angeles letter from Pleasanton on Saturday, March 13th 1971, which hit the newspapers on Tuesday, March 16th 1971 On March 18th 1971 a woman working at a Dublin, California store claimed she rang police on March 11th 1971 about sighting a man who looked just like the Zodiac sketch, but her phone call to Santa Rita police was ignored. Unfortunately, this claim was made after the newspapers released the breaking news of a new Zodiac letter - and with no record of the March 11th 1971 call - this could have easily be dismissed as a woman piggybacking off renewed Zodiac activity. However, an Alameda County sheriff's offiial confirmed that numerous calls were received the weekend before the recent Zodiac letter was published in the newspapers, from persons saying they had spotted the Zodiac Killer in the Dublin area. The Google map location of Dublin is shown as 4 miles north of Pleasanton, where the Los Angeles letter was postmarked. This distance is irrelevant in this case because the two cities actually border one another.
There are four viable options. [1] The Zodiac Killer was in the Dublin area and was spotted by numerous independent individuals who contacted police, [2] Somebody who looked like the Zodiac Killer sketch was in the Dublin area and was spotted by numerous independent individuals who contacted police. [3] The Zodiac Killer made the phone calls for self-publicity (negated if the calls were established as different people), or [4] The numerous individuals who rang the police were known to one another and manufactured a story that they saw the Zodiac Killer in town, while simultaneously mailing a letter from neighboring Pleasanton and fashioning a hoax. In other words, the Pleasanton letter has nothing to do with the Zodiac Killer. Alternatively, could it be possible that the Zodiac Killer sketch was that accurate, it generated numerous calls from the public, who recognised the Zodiac Killer in Dublin the weekend he mailed the Los Angeles Times letter? As stated previously, sightings of the Zodiac Killer in public were not unusual, but in this instance we had "numerous calls that poured in" from a location 40 miles east of San Francisco, four months after any notable Zodiac activity, in one weekend, when a "confirmed" Zodiac letter was mailed from the neighboring city of Pleasanton.