Another series of "Zodiac Killer" phone calls have been unearthed and sent to me by Jibberjabber, a previous contributor to the Zodiac Tapatalk forum. The first were received by Redding, California police on March 18th 1970, four days before the claimed attack on Kathleen Johns near Modesto on March 22nd 1970. Two calls were received - the first at 2:46am by police dispatcher Mrs. Wanda J. Derra - in which the person identified himself as "Zodiac" and stated "Today's the day_an Enterprise school bus". Several minutes later he rang again and reiterated the threat, saying "If you don't believe me just watch the kiddies tomorrow". Unfortunately, without any extra dialogue or information, it is practically impossible to determine the validity of this threat. The city of Redding straddles Interstate 5, approximately 140 miles north of Sacramento.
The second series of phone calls from somebody claiming to be the Zodiac Killer were received in Middletown, California, threatening students from the Middletown Unified School District on January 19th 1971, just under two months before the Los Angeles letter was mailed by the Zodiac Killer. Middletown lies about 20 miles north of Santa Rosa, from where the Zodiac Killer aimed a bombing threat on school buses on October 15th 1969, before the threat on schoolchildren was released in the newspapers (L.A. Times Oct 16th, S. F. Chronicle Oct 17th). At 2:15pm somebody claiming to be "The Zodiac" rang the high school and stated "I'm going to get some of the monsters". When questioned by the person in the office who he was referring to, the caller added "The ones walking home". About 45 minutes later, at 3:00pm, an anonymous individual rang the household of one of the school bus drivers and spoke to his wife, stating "You don't have to worry about your husband tomorrow morning because he won't be coming home. Neither are the kids because I'm going to take care of them". Again, without any pertinent information being revealed by the caller, no verification is possible.
The third series of calls were received by Redwood City and Belmont police in the Bay Area on Sunday, June 11th 1978, forty-eight days after the Zodiac Killer "I am back with you" letter was mailed on April 24th 1978. The difference here, was that all three phone calls were recorded by police. The calls, literally back-to-back, began at 3:20am with something like "I'm still around". San Francisco Homicide investigator James Tedesco revealed that the phone calls (similar to the 1978 letter) didn't contain any direct threats, and was unwilling to reveal how they were going to determine if the caller was the Zodiac Killer or not. Obviously, these are the most interesting of all the phone calls because they were recorded. However, like the Oklahoma radio station phone call on December 7th 1969 by somebody claiming to be the Zodiac Killer, the likelihood these recordings still exist today, or were ever played to Bryan Hartnell, David Slaight or Nancy Slover to give some indication of their authenticity or otherwise, will likely never be known.
For black and white issue..