As filming begins on Landscapers, the Olivia Colman crime drama about two of Nottinghamshire's most gruesome murders, we look back at the details of the case.
In October 2013, a police forensic tent appeared in the back garden of a house in Forest Town.
The house was, to the outside eye, an unremarkable property - a semi-detached home on on the corner of a small cul-de-sac, with neat little gardens front and back.
But what police discovered would eventually reveal a shocking story of greed, deceit and murder.
Buried in the garden were the bodies of Patricia Wycherley, 63, and her 85-year-old husband William, who had moved into the house back in 1987.
As far as the neighbours were concerned, the couple had gone travelling in 1998, and simply never returned.
In fact Pat and Bill, as they were known, had been shot and buried by their daughter Susan Edwards and her husband Christopher.
And for 15 years, the Edwards had pretended the elderly couple were still alive as they stole their money, sold their house - and even sent fake Christmas cards to relatives to keep up the pretence.
Now, a new drama about the killings is being filmed by the makers of 'Chernobyl', with Olivia Colman playing Susan Edwards.
This is the story of how the murderous treachery of the Edwards came to light.
What happened after the remains were found?
It was on October 9, 2013, that the bodies of Mr and Mrs Wycherley were discovered in the garden of the house in Blenheim Close.
But to begin with there was no hard evidence of who they were.
Police - who, as we shall see, already had a very good idea of the identity of the remains - initially only said that two bodies had been found by officers following up information received the previous week about an 'alleged incident' dating back to the 1990s.
However, they said that tests would have to be carried out to confirm their identities.
Neighbours said they believed the reclusive couple who had previously lived at the house had emigrated, although one admitted: "I found it a bit weird that they would have done that, because that’s something you do in your 50s and they seemed to be quite elderly."
Still, it wasn't long before police were publicly speculating about the bodies being the Wycherleys, even though they had not yet been identified.
“Neither William nor Patricia were ever reported missing and we can find no evidence of either of them being alive or dead," said Detective Chief Inspector Rob Griffin. "The discovery in their former garden last week may be the reason why.
"We have yet to formally identify the remains and so cannot say with 100 per cent certainty who we have found, but it’s not a great leap to imagine it might be the Wycherleys.”
The house had been sold since the Wycherleys disappeared, and police quickly ruled out any involvement from the new owner and tenant of the house. But someone, it was clear, had sold it.
Identification of the bodies
On October 15, police confirmed that the investigation was now a murder inquiry.
Two days later, an examination of the remains by an anthropologist revealed that one set of remains belonged to an elderly white man who was older than 60.
The second set of remains belonged to a well-built white woman, who was aged 40 or older.
This obviously fitted with the Wycherleys. Police also said the female remains had a distinctive feature in their anatomy - understood to be a spinal condition - which Patricia Wycherley was known to have.
Definitive identification would take weeks or months. And the results of the post mortem not yet been finalised.
In the meantime there were still gaps in the police's knowledge about the couple. William's background was being filled in, but little was known about Pat, although it was thought she was born in Fulham and her maiden name was Moore.
And police had also been trying to get in touch with the couple's daughter - 55-year-old Susan Edwards.
Arrest of Susan and Christopher Edwards
Susan and her husband Christopher, 57, had previously been living in a rented flat in Dagenham, East London, but in 2012 they had moved to live in Lille, France.
The reasons for that move would later become crystal clear.
In the meantime, Nottinghamshire detectives had tried to contact the Edwards by phone and e-mail, but after receiving one response there had been nothing more.
With the British police having no jurisdiction in France, finding the couple and bringing them back to the UK could have taken months.
But on October 30, DCI Griffin found an email sitting in his inbox.
Timed at 1.34pm and marked as of high importance, it was from Christopher Edwards, and said: "Later on today we are going to surrender ourselves to the UK Border Force Authorities at the Eurostar terminal at Lille Europe station.
"We would prefer to do this... since my wife is already sufficiently frightened. Please could you notify the UK Border Force at Lille Europe so that they may expect us."
Despite the breakthrough, the e-mail still posed a difficult problem for the police. If the Edwards surrendered themselves to French police, they would remain under French jurisdiction, and police in Britain would have no power to arrest them.
DCI Griffin decided to alert British police anyway to meet the next Eurostar to arrive at London St Pancras International from Lille in the slim hope that the Edwards would be on board.
He was right. The couple had caught the next train home and when they stepped back on to British soil, they were arrested and brought to Nottingham for questioning.
Three days later, on Saturday, November 2, the pair appeared at Nottingham Magistrates’ Court charged with the murder of Patricia and William Wycherley.
By that time, the post mortem examination had established that both people discovered in the garden at Blenheim Close died as a result of being shot.
The truth begins to emerge
In March 2014, during an appearance at Nottingham Crown Court, Susan and Christopher Edwards admitted for the first time that they had buried the Wycherleys in the garden of the house in Blenheim Close.
They admitted obstructing a coroner in the execution of his duty by burying the bodies between May 2 and May 10, 1998.
They also pleaded guilty to theft of a credit balance from a Halifax bank account between May 4, 1998, and October 31, 2013 - an early clue of what lay behind the whole story.
But they continued to deny that they had murdered the couple between May 1 and May 5, 1998.
For that charge, they would go to trial at Nottingham Crown Court in June.
The Edwards' version of events
Susan Edwards admitted the manslaughter of her mother, on the basis that she was provoked - a plea which was not accepted by the prosecution.
The version of events told by Edwards, now 56, was all but identical to that told by her husband Christopher.
The former librarian claimed she had visited the house in Forest Town over the early May bank holiday weekend in 1998, and had been woken on the Sunday, May 3, by a loud bang.
She said she went into the bedroom to find her father on the floor and her mother holding a revolver. An argument developed during which Susan Edwards claimed her mother told her she had had a sexual relationship with Christopher - Susan's husband - in 1992.
Mrs Edwards then shot her mother, she said, left the house and called her husband from a phone box - without revealing what had happened - before returning to the house, wrapping the bodies in blankets and hiding them under the bed.
She went back home, but returned the following weekend, this time with her husband - and stopping on the way to buy fish and chips.
She said that, over a fish and chip supper, she told Christopher what had happened and that the bodies were still upstairs.
Mr Edwards, a former accounts clerk, said he had agreed to help bury his in-laws because he believed his wife’s version of events and he didn't want to "throw her to the wolves" by going to the police.
Bizarrely, his wife said they had then watched the Eurovision Song Contest on television, before bringing the bodies downstairs and burying them in the garden.
What the prosecution said
The prosecution never believed that Susan Edwards had been visiting her parents on her own over the bank holiday weekend.
They thought that Christopher Edwards had also been present on that weekend when the Wycherleys were killed.
Indeed, they thought it was most likely that Mr Edwards - a former gun club member - had been the one who fired the shots from the .38 revolver which killed them both.
Prosecutors also didn't believe the bodies had been left for over a week before being buried.
They worked on the basis that the Edwards had a plan to kill the elderly couple and then pretend they were still alive in order to take their money - whether that was pension payments, benefits, borrowing money in their names, or even selling their house.
Which was, indeed, what had happened. A jury of eight women and four men dismissed the couple's story and took just over six hours to unanimously convict them of murder. They were each handed a life sentence with a minimum of 25 years.
DCI Griffin said the couple had acted with "cold calculation and meticulousness".
But it was the details of their deception that beggared belief.
15 years of deception
The Edwards had married in 1983, and had been in financial difficulties for much of their relationship. The murder of the Wycherleys gave them the opportunity to get out of those difficulties.
On the first day that banks were open again after the two killings, Susan Edwards went to the Halifax in Mansfield, and withdrew all the money (about £40,000) from two joint accounts which were in the names of her parents.
She closed the accounts, and opened a new joint account in the name of herself and her mother (giving Mrs Wycherley's address for correspondence).
Then, over the next 15 years or so, the Edwards systematically took money that was not theirs, forging signatures where necessary to keep receiving benefits.
They took the Wycherley's private pensions, industrial injuries benefits, winter fuel payments and Christmas bonuses. They obtained loans and credit cards in Mrs Wycherley's name.
The total amount diverted into the joint account was said at the trial to have been £245,705, although at a later proceeds of crime hearing this was revised upwards to £286,285.
This included the proceeds of the sale of the house in Blenheim Close, sold in 2005 for £66,938 using a false signature.
Neighbours and relatives were told that the Wycherleys had gone travelling or had moved to the coast for health reasons.
Mrs Edwards wrote to relatives in 2007, explaining that her parents had decided to sell the house and were touring Ireland "because of the good air" and might decide to settle there permanently.
And in 2011 she sent a Christmas card to Mr Wycherley's niece saying her father, was "having his second youth".
Some letters and cards were signed by herself on behalf of her parents, but others were supposedly actually signed by her parents - even though they had been dead for many years.
How the couple were caught
The Edwards might have got away with their crimes if it hadn't been for the fact that Mr Wycherley - had he still been alive - would have been approaching his 100th birthday.
In 2012, the couple received a letter from the Centenarian Society - an organisation helping people celebrate their 100th birthdays - asking for a face-to-face meeting with Mr Wycherley.
Clearly, the Edwards knew that was a meeting which would never be able to happen.
They raised £5,000 from selling books and other items, borrowed £10,000 from work, and fled to live in an apartment in Lille.
But once there, they continued to struggle for money.
Things got so bad that Mr Edwards decided to ring his stepmother back in the UK for more money.
When she asked why they had gone to France, he told her what had happened - saying that Susan had shot her mother, and he had helped his to bury her parents in the back garden, but not admitting to their murders.
His stepmother went to the police at the beginning of October, 2014.
DCI Griffin said: "When we received that call on October 1, it was difficult to believe that what she said had happened could have happened. But we took it seriously and that is when the investigation started.
"In the days that followed, we started to see that perhaps it was all true, and that was confirmed when we started the excavation in the garden and discovered Patricia and William were there."
Just £17 in a bank account
The obvious tragedy of the case was that two innocent people lost their lives. The irony was that the Edwards didn't even succeed in paying off their debts.
In fact their debts continued to mount, and when they were arrested they owed more than £160,000.
They did not live a lavish lifestyle, but instead splashed out thousands of pounds on Hollywood memorabilia, including signed photos and autographs of Gary Cooper, and stamps featuring Frank Sinatra.
In fact over just two years, Christopher Edwards spent £14,000 on mementos of movie star Cooper. There was also a £20,000 signed photograph of Sinatra.
When financial investigators looked at their assets, they found that Mr Edwards only had £17 left to his name in a bank account.
His wife had £11,608, much of which was tied up in memorabilia yet to be sold.
When they were arrested at St Pancras, their luggage amounted to just a few worn suitcases.
Failed appeal
In February 2015, Susan Edwards lost an appeal against her 25-year minimum sentence.
At London's Criminal Appeal Court her barrister, David Howker QC, said the term did not take enough account of mistreatment she claimed to have suffered at her father's hands, which he argued was a 'slow-burning' form of provocation.
Mr Howker also said she is likely to die behind bars and will probably never see any visitors as she had no-one except her husband - who she might never see again.
He said: "We submit that it does have the potential to have been a slow-burning provocation over the years, and that the judge, if she did reject it, was wrong to do so."
Mr Howker also said Susan Edwards and her husband had lived an 'isolated' life which had made her 'vulnerable and naive' for her age.
He added: "She had no-one in her life but her husband and she will therefore serve this prison sentence without any prospect of a visit from anybody.
"She will serve it knowing that, whatever the rights and wrongs of her husband's involvement, she feels completely responsible for him becoming involved and feels she has destroyed the rest of his life.
"The imposition of this minimum term will probably result in her dying in prison."
But the appeal bid was rejected by three of the country's most senior judges.
Dismissing the appeal, Lady Justice Rafferty said the crown court judge was entitled to reach the conclusions she did when setting the minimum tariff.
Sitting with Mr Justice Jeremy Baker and Mrs Justice Carr, she added: "She did so having reminded herself that 15 years had elapsed since this young woman had left home, before she returned and murdered the people she said she hated.
"She also reminded herself of the cynical and determined exploitation of the ill-gotten gains, consequent to the murders, which the appellant had enjoyed over years and in more than one jurisdiction."
Christopher Edwards also launched an appeal but his was rejected on paper at an earlier stage and he did not pursue his case to a full court hearing.
* Original reporting by Rebecca Sherdley, Chris Breese, Dominic Howell, Alexander Britton, Jon Robinson and Bryan Henesey.
