"Son of Sam" (SOS) cult activities [existence was already proved, based on evidence gathered from witness testimony, letters, newspaper-articles, nonfiction works of literature, such as -- (the book by Maury Terry);

Read/buy the book, (shown above) from "Google Reads:"

https://www.goodreads.com/book/show/50694632-fuzz-one

Buy the book, (shown above) from Amazon .com :

https://www.amazon.com/Ultimate-Evil-Investigation-Americas-Dangerous/dp/038523452X/ref=mp_s_a_1_4?crid=1Z54UC6LFUUN&dchild=1&keywords=the+ultimate+evil+maury+terry&qid=1634587216&sprefix=the+ultimate+evil&sr=8-4

["The Ultimate Evil: An Investigation into America's most Dangerous Satanic Cult," (‎Dolphin Books/Doubleday; First Edition/First Printing [January 1, 1987] ISBN-10: 038523452X, ISBN-13: 978-0385234528)] available for $6.66 (in Kindle version) or $775.00 (in hardcover form) -- [is information in the real world (only if, one does enough work into the investigation/search of, knowing where and what to look for, read, comprehend, and connect dots on the learning about (this information, is information, that is very far removed from society, highly suppressed information not learnt by many, as this information (-was) kept very far away from the public's awareness, (information, almost impossible to find) where, (only, once before) the public could not access anything that (reflected a story that has linearity, shape, and form) based on (information gathered from) statements made in witness interviews (Maury Terry's book, "The Ultimate Evil: An Investigation into America's most Dangerous Satanic Cult," and other documents/articles) is information, that (has been confirmed to be true), since this information (has matched up with) tangible evidence, (refer to the work of Manny Grossman, https://youtu.be/6ygMaj3KUGM ) is identically and "side-by-side," the same information [directly reflected in conversation content taken from witness interviews, (refer to Manny Grossman's YouTube channel) documents/articles, (such as documents/articles, that were already) published in mainstream news papers, and "The Son of Sam letters," (do some Google .com searches, to read/learn about this information) and the information found in Maury Terry's book, "The Ultimate Evil: An Investigation into America's most Dangerous Satanic Cult,"] is verified data about the world and its inhabitants [reflected the story (has shape and form) about the Son of Sam's (cult) members, basis for it's origination/inception, and detailed description of its nefarious (highly illegal) criminal activity, now for the first time (has a much more complete picture) certainly gave much more deeper insights  (mostly based on the information found in Maury Terry's book, "The Ultimate Evil: An Investigation into America's most Dangerous Satanic Cult," is available for purchase on Amazon .com , by clicking on the (url) link shown below:

https://www.amazon.com/Ultimate-Evil-Investigation-Americas-Dangerous/dp/038523452X/ref=mp_s_a_1_4?crid=5SPPDRIILMHF&dchild=1&keywords=the+ultimate+evil+maury+terry&qid=1634444528&sprefix=THE+ultimate+evil+&sr=8-4

-Mark R. Rowe