Right Lennon was killed the anniversary of the date in Japan when they bombed Pearl Harbor. Investigators pointed this out but nothing became of their insight. When Manson killed Sharon Tate one of the detectives pointed out that Helter Skelter was a Beatles song but at first no one thought it was related. It turned out to be central to their entire thinking. The Mancines used I am the Walrus in the way the Manson family used Helter Skelter.
Here's an example of how closely impacted the cluster bomb of symbols is in the letters. De De is the birthday that King was shot on by the statement of coincidence actually made openly in the letters. That's the fourth letter of the alphabet. He was killed 4/4. It is also DD the Library of Congress classification for the study of Nazi Germany.
It takes study to see the symbolic pact in the letters and what she calls, "Nobuko's stupid code about what boys should do and girls should do." But she underlines the word front and talks a good deal about October 4, which is 10-4, like mission control.
It is the impacted, cluster bomb style of the symbolism in the letters that gives away the human intention in the crime.