With claims of devil-worshipping orgies fuelled by the drinking of blood, it was the stuff of horror stories. But the evidence against the teens was a concoction of fantasy, lies and false confession.And it led to the ­innocent youths being branded Satanic killers for little more than liking heavy metal band ­Metallica and borrowing a book on witchcraft.

read more True story of ‘Satanic murders’ which inspired Colin Firth’s ‘deeply disturbing’ new film Devil’s Knot – Mirror Online.