When I did some research to identify the witches who pushed my mother down the stairs, I discovered that there was a Satanic cult operating in the late 1960s and 1970s called “Four Pi.” Several elements in the description of this cult matched the things my mother had said about t: they sacrificed black dogs and cats in their rituals, they claimed to perform human sacrifice, and their leader – the “Grand Chingon” – was a middle-aged, wealthy California businessman.
Animal and human sacrifice are common elements of self-proclaimed Satanic cults, but the middle-aged businessman as leader seemed unusual enough to be more than a coincidental match. For a time in the 1970s, my mother worked as a real estate broker. She had told me that the pressure to join the “coven” came from a wealthy businessman whom she had met through her real estate deals.
I found this information about Four Pi in the book Cannibal Serial Killers: Profiles of Depraved Flesh-eating Murderers, by Christopher Berry-Dee, which was published in 2011. Berry-Dee was summarizing information that journalist Ed Sanders had gathered in 1969 while doing research for his book The Family: The Story of Charles Manson’s Dune Buggy Attack Battalion, which was first published in 1971.
I am not sure whether Four Pi was real and actually tried to recruit my mother or whether she read The Family and adopted the Four Pi section as part of her life. I’m also not sure which option scares me more – Satanists  or a mother who couldn’t tell the difference between reality and fantasy.
 Satanists are not necessarily cult members who perform murders. In general, Satanism is a philosophy based on the perceived practices and beliefs of Satan. https://en.wikipedia.org/wiki/Satanism