The original article was easy to check. The prosecutors statement that the defendants hoped a virgin sacrifice would earn them "a ticket to hell" is contained in the original article reporting of the case.
The defendants pleaded guilty to the charge of killing a 15 year old girl,Elyse Pahler, and were sentenced as juevenilles. Under California law, at least at the time of sentencing, they had to be released upon their 21st birthdays.
The "ticket to hell" was the price they would have to pay after death for the Devil making them into a successful band. They were not worshipping the Devil they were trying to use him.
Lyrics from the bands they emulated convinced them that this was possible. The sickos were trying to create a short cut to success in the music world. Had they been true satan worshippers they would have known that human sacrifice is not part of the program.
The fast buck, instant gratification, shortcuts to success...Greedists, if you will, who attempted to use the devil.