The chilling photo that could help solve a 53-year-old mystery.

What may look like an innocent holiday snap is actually hiding a sinister crime.

Wrapped up in warm clothing against the harsh weather of Lancashire’s Pennine moorland, Myra Hindley smiles for the camera.

Her partner Ian Brady took the photo after they had buried the remains of their youngest victim, 12-year-old Keith Bennett. The photo is the closest thing police have to a location of the body.

From 1963 to 1965, Brady and Hindley terrorised the streets of Greater Manchester in the UK – abducting, torturing and killing five children, aged between 12 and 17 years old, in what has been dubbed the ‘Moors Murders’.

Keith, their third victim, was abducted while on his way to his grandmother's house in Longsight, Manchester, in 1964. He was tortured, sexually assaulted and strangled. And to this day, police have not been able to find Keith's remains.

Detectives released the photo of Myra Hindley in 2009, after finally admitting defeat in their long search for the young boy's body. It's believed the photo is the last remaining clue.

Over the years, Brady and Hindley, who were jailed in 1966, had both offered to help in the hunt for the body. In the mid 1980s they were taken separately back to the moors to see if they could pinpoint the location and in 2001, after being shown these pictures, Hindley drew a map of where she thought the burial site was.

However, police searches have not been successful and many believe that Hindley and Brady were stringing the police along as part of a sick game.

There have been many false leads in the search for Keith over the years. According to the Sunday Express, in 2016 Brady revealed where he buried Keith to his friend, Dr Alan Keightly.

"There is a deep rise on the right where John Kilbride was buried. If you climb up the hill you turn left where it turns flat, turn left at Shinybrook and they walked for three miles," Keightly said.

"Brady led the way along Shinybrook. He had a pre-laid plan for Myra to take the rope after three miles then Brady switched the leadership and made Myra go and put the ­stranglehold on Keith Bennett, raped him and killed him."

However, police searches in that area have turned up nothing.

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Keith's mother, Winnie Johnson, passed away in 2012 aged 78, never knowing where her son was buried. She had tirelessly campaigned for 47 years to find his body and give him a proper funeral.

Hindley died in prison in 2002 aged 60, and Brady, 79, remains behind bars, while the search for Keith's body continues.