Keith was one of five victims of Ian Brady and Myra Hindley, with three of them later found buried on the moor.
Greater Manchester Police (GMP) began searching the area on 29 September but on Friday said there was “no evidence of the presence of human remains”.
Detective Chief Inspector Cheryl Hughes said: “The investigation into Keith’s disappearance and murder has remained open since 1964 and it will not be closed until we have found the answers his family have deserved for so many years.
“The excavation and examination at the site is complete and, to reiterate, we have found no evidence that this is the burial location of Keith Bennett.”
Author Russell Edwards told the Daily Mail he believed he had located Keith’s makeshift grave following “extensive soil analysis” which indicated the presence of human remains.
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Mr Edwards is said to have commenced his own dig – close to where the other Moors murders victims were found – and uncovered a skull with teeth, which independent experts are reported to have concluded is human.
DCI Hughes said officers “met with the member of the public who later provided us with samples and copies of the photographs he had taken”.
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“He also took officers to the location from which he had obtained these and provided grid references,” she added.
The senior investigating officer said experts had completed an examination of the site, adding: “The items given to us by the member of the public have been examined by a forensic scientist and though this hasn’t yet indicated the presence of human remains – more analysis is required.”
GMP previously said it was provided with a photo showing what experts working with Mr Edwards had interpreted as a human jaw bone.
But DCI Hughes said on Friday: “At this stage, the indications are that it would be considerably smaller than a juvenile jaw and it cannot be ruled out that it is plant-based.”
Keith Bennett’s brother Alan had previously expressed doubt that the author’s findings would turn out to be the remains of his sibling.
Writing on Facebook after the search of the site began, he said he “cannot escape the feeling that we have been here before”.
Brady and his accomplice Hindley sexually assaulted, tortured and murdered children over two years in the 1960s.
While the bodies of four of their victims were discovered, Keith’s remains have never been found.
Keith was last seen by his mother in the early evening of 16 June 1964 after leaving his home in Longsight, Manchester, on his way to his grandmother’s house nearby.
Brady told Hindley he sexually assaulted and strangled the boy.
Despite a plea to Brady from Keith’s mother, Winnie Johnson, to reveal the details of where her son’s body was, holding back the information was believed to be the killer maintaining a last element of control.
Mrs Johnson died in 2012 without fulfilling her wish to give him a proper Christian burial.
Brady confessed to Keith’s murder but claimed he could not remember where he was buried.
Brady and Hindley’s other victims were 16-year-old Pauline Reade who disappeared on her way to a disco in July 1963; 12-year-old John Kilbride who was snatched in November the same year; Lesley Ann Downey, aged 10, who was lured away from a funfair on Boxing Day 1964; and 17-year-old Edward Evans who was axed to death in October 1965.
The killers were caught after the Evans murder and Lesley and John’s bodies were recovered from the moors.
Hindley died in jail in 2002 at the age of 60, while Brady died in a high-security hospital in 2017 aged 79.
Canterbury MP Rosie Duffield has resigned from the Labour Party.
The 53-year-old MP is the first to jump ship since the general election and in her resignation letter criticised the prime minister for accepting thousands of pounds worth of gifts.
She told Sir Keir Starmer the reason for leaving now is “the programme of policies you seem determined to stick to”, despite their unpopularity with the electorate and MPs.
In her letter she accused the prime minister and his top team of “sleaze, nepotism and apparent avarice” which are “off the scale”.
“I’m so ashamed of what you and your inner circle have done to tarnish and humiliate our once proud party,” she said.
Since December 2019, the prime minister received £107,145 in gifts, benefits, and hospitality – a specific category in parliament’s register of MPs’ interests.
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Ms Duffield, who has previously clashed with the prime minister on gender issues, attacked the government for pursuing “cruel and unnecessary” policies as she resigned the Labour whip.
She criticised the decision to keep the two-child benefit cap and means-test the winter fuel payment, and accused the prime minister of “hypocrisy” over his acceptance of free gifts from donors.
“Since the change of government in July, the revelations of hypocrisy have been staggering and increasingly outrageous,” she said.
“I cannot put into words how angry I and my colleagues are at your total lack of understanding about how you have made us all appear.”
Ms Duffield also mentioned the recent “treatment of Diane Abbott”, who said she thought she had been barred from standing by Labour ahead of the general election, before Sir Keir said she would be allowed to defend her Hackney North and Stoke Newington seat for the party.
Her relationship with the Labour leadership has long been strained and her decision to quit the party comes after seven other Labour MPs were suspended for rebelling by voting for a motion calling for the two-child benefit cap to be abolished.
“Someone with far-above-average wealth choosing to keep the Conservatives’ two-child limit to benefit payments which entrenches children in poverty, while inexplicably accepting expensive personal gifts of designer suits and glasses costing more than most of those people can grasp – this is entirely undeserving of holding the title of Labour prime minister,” she said.
Ms Duffield said she will continue to represent her constituents as an independent MP, “guided by my core Labour values”.
The King has paid tribute to Scotland as a “uniquely special place” for the Royal Family as he marked the 25th anniversary of the Scottish parliament.
At the ceremony to commemorate a quarter of a century since parliament opened at Holyrood, the King said: “Speaking from a personal perspective, Scotland has always had a uniquely special place in the hearts of my family and myself.
“My beloved grandmother was proudly Scottish, my late mother especially treasured the time spent at Balmoral, and it was there in the most beloved of places, where she chose to spend her final days.”
He said we are all “united by our love of Scotland”, paying tribute to its “natural beauty”, “strength of character”, “diversity of its people”, “passions and frequently deeply held beliefs”.
“From the central belt to the north Highlands, across the islands in Ayrshire, in the Borders, the cities, towns and villages, all the coastal communities, who I wonder, could not fail to be moved by this complex Caledonian kaleidoscope?,” he asked as presiding officer Alison Johnstone and the Queen sat beside him.
After he gave the speech, the King was hugged by a member of the public – who said she did so “because of him being unwell”.
The 75-year-old was diagnosed with cancer in February but has since returned to public duties.
Yvonne Macmillan, 59, from East Renfrewshire, attended the anniversary ceremony with her husband Russell who is registered blind and chosen as a “local hero” for work in their area.
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“I asked him if he was feeling better and if I could give him a hug. I actually said to him: ‘Can I hug you?’,” she said.
“As I hugged him I said, ‘God bless you’, so it was like God giving him a hug.”
While Sir Tony Blair’s Labour government legislated for Scottish devolution in 1997 – parliament officially opened at Holyrood on 1 July 1999.
The King has made six visits to the parliament since 1999 – while his mother Queen Elizabeth II made 10 visits during her lifetime.
Scottish First Minister John Swinney is one of a number of MSPs who have been at Holyrood since the start of devolution.
He said in his own speech in Edinburgh on Saturday that the parliament has “placed itself at the very heart of the nation”, describing it as a “vessel of enlightenment, invention and creativity”.
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The SNP’s Christine Grahame is another MSP who has been there since the start.
“Free tuition, free prescriptions, game-changing policies to tackle child poverty, the ban on smoking, the baby box, ScotRail back in public ownership – none of this would have been possible without the Scottish parliament and the strength of our commitment to self-determination,” she said on Saturday.
The King said the devolved parliament has the ability to “touch and to improve the lives of so many individuals”.
But he added that “there remains much more to be done” for Scotland, the rest of the UK, particularly with regards to climate change.
“Let this moment therefore be the beginning of the next chapter,” he told those assembled.
“The achievement of the past and the commitment shown in the present give us the soundest basis for confidence in the future.”
A moped riding phone thief was caught red-handed after police tracked the device down hours after he snatched it from a woman’s hand.
CCTV footage released by police showed a masked moped rider mount the pavement in Croydon, south London, to swipe a phone from a woman’s hand on 6 March, while another victim had theirs stolen while they waited for a bus an hour later.
Amari Scott, 20, looked surprised when confronted by officers inside a shop, where he was found with two mobile phones.
“We’ve just had a moped rob a mobile phone off the pavement and the phone is pinging in this location,” one of the officers told him in body-worn camera footage before Scott was handcuffed and led away.
Police also recovered a stolen motorbike and Scott, from Sutton, south London, was later jailed for four years.
Two teenagers who committed four robberies in the space of just half an hour were also arrested as part of a crackdown in Croydon.
Aged 16 and 17, the teens were issued with referral orders after pleading guilty to charges of robbery, attempted robbery and attempted grievous bodily harm.
One of the teenagers tried to discard a knife before she was arrested after a foot chase, telling officers: “The knife wasn’t mine”.
The other ran away, leaving a knife and his bag, but was lying in bed at home when he was arrested shortly after.
The Metropolitan Police said officers are intensifying efforts to tackle robbery and theft, encouraging victims to report incidents as they happen to increase the chances of catching the criminals.
Chief Inspector James Weston said: “We understand the impact that robbery has on victims – it is invasive and frightening.
“That’s why our teams are working so hard to deter and catch offenders to reassure our local community.
“Thanks to the hard work of officers, our partners and community grassroots organisations, we are stepping up our efforts and tackling the issues that matter most to the people of Croydon.”