Thinking about childhood friends

This is going to sound strange, but the topic of this post stemmed from research into the Zodiac Killer. If you aren't aware, the Zodiac Killer operated in the San Francisco Bay Area between Dec. 1968 and Oct. 1969. He, as far as investigators are aware, murdered five people, but may have a higher kill count. He was never caught. And, presently, he is one of the most infamous individuals in the annals of serial killer history. One of the main suspects in the case was Arthur Leigh Allen, who was born on Dec. 18, 1933 in Honolulu, Hawai'i. Paul Avery, a journalist working at the San Francisco Chronicle at the time of the killings, was born on April 2, 1934 also in Honolulu, Hawai'i. On Halloween, 1970, the Zodiac sent Avery a card taunting him. The Zodiac, calling himself Avery's "secret pal," more-or-less threatened the journalist, writing "Peak-a-boo! You are doomed!" It's here where things get interesting. As mentioned above, Allen and Avery were both born in Hawai'i around the same…