miimaa--There are most definitely "confirmed" satanic murders and crimes. I'm pleased that you don't believe in satanism but obviously there are many who do and who practice it. You might be correct in that these people are sick but a murder is a murder and I believe a motive is of value to note. We have a thread concerning a variety of cases here:
http://www.websleuths.com/forums/showthread.php?t=112542&highlight=russian+teens
And here's a case of two teen "dabblers" in San Jose who killed their friend to praise Satan:
CA~Michael Russell murder trial/stabbed to death by teen satanists - Websleuths Crime Sleuthing Community
And another recent case of a teen and older man who killed a 93 year old woman in her bed while forcing her to worship Satan:
WI~"Satanic Thrill Killer", Austin Davis Sentenced for murder of 93 yr. old - Websleuths Crime Sleuthing Community
And a self-professed satanist (with the numbers 666 tattooed on his forehead) who dropped his dead girlfriend off at the police station:
Registered Sex Offender Drops Dead Body Off At Sheriff's Office - Websleuths Crime Sleuthing Community
These are just a few recent cases which come to mind where satanism is known and accepted to be an element in the murder. You might also be interested to know that there's a new book being promoted by a man named Winter Laake, which supposedly builds on the principals of LaVey. The Church of Satan has a website where you can read their tenets. They publicly state that no child or animal is to be harmed and yet one of their tenets is to "destroy anyone in your path" who bothers you. I keep a close eye on any crime which might be connected with satanism and try to start threads on them. And please please note that the Wicca path and paganism does NOT equate with satanism. Wicca calls for peace and harmony. Satanism calls for self-indulgence.
Here's the 11 tenets of satanism:
http://web.satanism101.com/rules.html
We must remember that "dabbling" can be harmless. If we're talking about chanting and robes and candles, that hurts no one. However, when actions move beyond that to rape, torture, murder and dismemberment, that's a whole new level of evil. Personally I feel strongly that the element of satanic motivation MUST be considered when investigating crimes involving these elements. Unfortunately, the FBI does not share my beliefs. They state strongly that they only consider the crime itself and are very committed to preventing any sort of hysteria.
You might want to look up the cases of Ricky Kasso and his followers and the murder of Elyse Pahler. Several sites for survivors of satanic abuse have posted special calendars of ritual dates. In some cases, those dates coincide with the holidays celebrated by other faiths. The one I use most frequently is here:
Occult Ritual Calendar
I always check the dates and facts surrounding murders and we have a number of threads which concern me greatly. I'd like to think that LEOs and DAs are doing the same.