The newspaper detailed the slayings of the Manson Family at the Sharon Tate residence and stated "San Jose detectives developed a possible connection between the cases after conferring with Los Angeles officers. Six members of a hippie clan led by Charles Manson have been charged with murdering five persons. One of the members of the nomadic band, Susan Denise Atkins, 21, is from San Jose. The Manson "family" has visited Miss Atkins' father there". This newspaper article had all the ingredients for the phone call on December 19th 1969. in which the Zodiac Killer may have used the Manson "family" murder of "five" people to concoct the San Jose telephone message of "I am going to kill five of you officers and a family of five between now and Monday".
The Zodiac Killer may have had a long memory, because 8 1/2 years later, a letter mailed to a Los Angeles radio station again threatened to kill two officers and "five" people in total, including Susan Atkins of the Manson Family, whose name featured three times in the Los Angeles Times article on December 18th 1969. On May 2nd 1978, a letter arrived at KHJ-TV in Los Angeles, stating that the Zodiac Killer was "planning to kill five people in the next three weeks", rather than "five of you officers and a family of five between now and Monday". The new threat promised to kill Chief Daryl Gates, Chief Ed Davis, Pat Boone, Eldridge Cleaver and Susan Atkins. The phone call on December 19th 1969, and the letter mailed on May 2nd 1978, were both seemingly inspired by news related to the Manson Family and Susan Atkins, suggestive of one mindset that yearned to kill five.