That's not an answer to the question. Any kook can write a book.
I'm asking you if it makes logical sense that Satanists have committed these kills in rural areas, over all 50 states, for decades now, without a single one of them ever being caught, and not a single whistle blower coming forward.
They are in fact around and there is also believe It or not a satanic bible. You would be dealing with persons far more shall we say technology oriented than many would want to consider. Measures are taken from getting caught. Take the satanic worship practice of obtaining a certain scared candle. Made from what you might ask? Baby fat. Rare IMO with much higher legal risk but known to happen. Enough so it has been written about.
There is a faster to read less complicated book called Day of Deception by Rev John Hagee. He goes into some brief but educational details on this issue for parents. Please also keep in mind that some sects such as the Roman Catholic Church consider demonic powers so strong they hold exorcisms to deal with it. But beyond the spiritual dangers issue {a very real one IMO} is the fact some occult wannabe's also believe these rituals and also try and copy them. Thus teenagers practices of mutilation some parents see as being harmless.
Blood gone? Sex organs gone? Yep first thing popped in my mind was it sounds very much like a satanic cult operation.