NO crime has caused as much horror and outrage as the Moors Murders.
Yorkshire Ripper Peter Sutcliffe, mass murderer Fred West and Soham killer Ian Huntley all left their terrible mark.
But the acts of evil lovers Ian Brady and Myra Hindley 40 years ago have left horrible, unforgettable memories.
Brady and his peroxide blonde lover kidnapped, tortured and murdered young children and teenagers for kicks.
They lured them from the streets of Ashton and of Hyde, in Lancashire, and later buried the young bodies on Saddleworth Moor.
No-one who was in the oak-panelled courtroom in Chester during the spring of 1966 will ever forget one damning piece of evidence.
The jury heard a tape-recording, made by the evil pair, in 10-year-old Lesley Ann Downey pleaded with the pair to let her go. But then there were screams and, finally, silence.
Hindley and Brady were convicted at Chester of murdering Lesley, 12-year-old John Kilbride and 17-year-old Edward Evans.
Hindley later admitted she and Brady had killed twice more.
Their other victims were Pauline Reade, 17, and 12-year-old Keith Bennett.
That confession prompted another huge search on the bleak and desolate moorland stretching above Holmfirth and Meltham across to Saddleworth.
Thousands of motorists use the A635 road from Holmfirth to Greenfield each day without realising two young bodies lay buried in the peat.
In 1986, both Brady and Hindley were taken back to the moors to try and pinpoint the spot where they had buried their victims.
Days of digging by a small police team led by Peter Topping finally led to the discovery of Pauline Reade's remains. But Keith remains missing.
And now, eight years on, his mother and family still hope he can be found and laid to rest.
Hindley is believed to have told police the body was buried near Shiny Brook, a stream tumbling into the Wessenden Valley. But nothing was ever found.
Hindley died in prison in November 2002, and Brady, now 66, is detained in Ashworth secure hospital in Merseyside.
But for the families that remain, their crimes can not be forgotten.