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Review announces new forensic evidence linking Dai Morris to bloody sock found at scene of Clydach murders



A review of issues relating to the conviction of David Morris for the murders of Mandy Power, her two daughters Katie and Emily and her mother Doris Dawson in Clydach in 1999 has led to significant findings as a result of analysing key forensic evidence.

A scientific link between Morris and a sock, widely accepted as being used by the offender during the killings, has now been identified during an independent investigative assessment of various matters raised by his legal representatives.

Scientific examination of the sock has identified the presence of a mixed *Y-STR profile using technology which would not have been available to the original investigation team over 20 years ago.

While the presence of a link to Morris (or a male relative of his paternal lineage) and the mixed Y-STR profile has been identified, the science cannot determine how or when this profile was transferred onto the exhibit, but the conclusion of scientists is that it is “more likely” that Morris contributed to the DNA profile found on two different areas of the blood-stained sock than if he did not contribute DNA to them.

Following the tragic events in Kelvin Road, Clydach in June 1999, South Wales Police carried out an extensive investigation into the murders and the scale of the investigation was the largest and most complex ever undertaken by a Welsh police force.

In 2002, David Morris was convicted of the murders by a unanimous verdict at Swansea Crown Court. His conviction was overturned on appeal due to a conflict of interest by a defence solicitor. A retrial was held at Newport Crown Court in 2006 and Morris was convicted again. He was sentenced to life imprisonment.

Mandy Power with her two daughters Katie and Emily murdered along with Mandy’s mother Doris by David Morris

The matter has been considered by the Criminal Cases Review Commission as recently as 2018. Following a thorough review of the case material they decided not to refer it to the Court of Appeal as no new evidence had been identified.

In November 2020, legal representatives of Morris contacted South Wales Police requesting the release of various exhibits from the investigation.


This request was the subject of careful consideration and the force decided on a course of action which involved the appointment of an independent senior investigating officer and an independent forensic laboratory to oversee a forensic review of the case material.

This work – carried out under the banner of Operation Dolomite – has been led by experienced detectives Steve Carey and Ian Ringrose, supported by police forensic expert David Lloyd, all of whom are from Devon & Cornwall Police. An independent forensic science laboratory, Cellmark Forensic Services, was commissioned to carry out forensic work.

Following the death of David Morris on 20th August 2021, permission was given by his family to obtain a blood sample to allow forensic examinations to take place.

Assistant Chief Constable David Thorne, of South Wales Police, said: “The decision to carry out an investigative assessment did not constitute a reopening or reinvestigation of the murders, nor did it demonstrate any lack of confidence in the conviction of Morris and the subsequent case reviews. Morris was convicted unanimously by a jury on the strength of the prosecution case and independent reviews by the Criminal Cases Review Commission have never identified any evidence which would determine the conviction to be unsafe.

“However, the advancement of forensic technology has provided the opportunity for evidence-based answers to some of the questions which have been raised about forensic issues in this case, along with other matters raised by the BBC Wales documentary ‘Beyond Reasonable Doubt’. The appointment of Steve Carey and his team has ensured the review has been conducted with a layer of independence.”


The outcome of the investigative assessment has been communicated to the victims’ families, the family and legal representatives of Morris and others affected by this case.

Mr Carey said: “My team has carefully examined the issues raised and subject to the terms of reference for Operation Dolomite.

“In the opinion of the forensic scientist regarding these results – which were obtained from samples extracted from two separate areas of the sock at the time of the original forensic examination – it is more likely that David Morris (or a close paternal-line male relative of his) contributed DNA to them than if he did not.

“In relation to one sample, the lead forensic scientist has stated to me that in his opinion the low-level and incomplete mixed Y-STR result is as would be expected if Morris had contributed DNA to it. For another person to have contributed to it, the components must match by chance.

“The scientist would have a very low expectation of selecting a male individual at random from the Western European population having components in their Y-STR profile being represented to the same extent as those in the Y-STR profile of Morris.


“To test this, an evaluative tool developed by Cellmark Forensic Services showed that from a dataset of 9,357 Western European males, no-one is represented to the same extent as the component in the Y-STR profile of Morris.

“It should be noted that the results do not allow the scientist to interpret how the DNA got onto the sock and therefore whether this was through directly touching the item or indirect transfer but the identification of this link has been possible due to the development of technology which would not have been available to the original investigation team.

“This is significant as the sock was recovered from the murder scene and it was widely accepted that it was used by the killer.

“The outcome of the forensic assessment and completion of further actions have not established any information that undermines the conviction of Morris. In my view, as the independent senior investigating officer, the new findings from the samples taken from the sock support the existing evidence that originally convicted him.”

Operation Dolomite also investigated accounts provided by two witnesses who featured in the BBC documentary. They were interviewed by officers and several enquiries were conducted to try and corroborate and support their accounts.  All this evidence was shared with the Crown Prosecution Service. None of the information provided by the witnesses undermines the conviction of Morris.


ACC Thorne added: “Notwithstanding the fact that Morris has been convicted based on overwhelming evidence against him, South Wales Police has shown a commitment to providing evidence-based answers to the issues which have been raised about this case over many years.

“This commitment has now resulted in a forensic link between the convicted killer David Morris and an item of great significance which was recovered from the murder scene. South Wales Police commissioned the review in the hope that we could in some way provide closure for those most affected by the murders. In particular, those who lost three generations of the same family and have had to revisit those painful memories time and time again over the last two decades.

“The findings from Operation Dolomite will be shared with the Criminal Cases Review Commission to complete the due process and demonstrate transparency.  However, in the knowledge of the conclusions drawn from this review, South Wales Police would like to show respect to the family and those affected by these terrible crimes by finalising this case.

“Our thoughts as ever remain with the family of Mandy Power, her children Katie, aged 10, and Emily, eight, and her 80-year-old mother Doris, who still experience such painful memories even to this day.”

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‘David Morris murdered our family’: Rare statement from Clydach murders’ family members




The family of Mandy Power, her daughters Katie and Emily, and Doris Dawson who were brutally murdered over 20 years ago have issued a rare public statement.

The family are appealing for an end to speculation over the conviction of David ‘Dai’ Morris following the killer’s death in prison.

Mandy Power, her two daughters Emily and Katie, along with her mother Doris Dawson were all savagely beaten at their home on Kelvin Road in Clydach, with the property then set on fire.

Despite continuing to protest his innocence, Morris was twice convicted of the multiple killings, with new forensic evidence on a bloody sock found at the crime scene also linking him to the killings.

Morris died in prison in August this year.

The Dawson family are now reasserting that the right man was convicted of the killings, and are calling on those continuing to dispute this to accept Morris committed the crimes.

In the statement the Dawson family said: “In June 1999 our much loved Mam, Sister Mandy and our nieces Katie and Emily were cruelly taken from us in the most horrific way anyone could ever imagine. The person responsible for these horrific crimes was David George Morris.


“The loss and grief our family went through and continue to go through is heart-breaking and affects so many aspects of lives. No family should ever go through what we have and still do.

“It hasn’t been helped by the constant campaigns, protests, incorrect media reports, make-believe books and TV programmes that have mislead some of the public into believing Morris is innocent. These have blatantly ignored proven facts and replaced them with misinformation to hide the truth.

“During their investigation, police found a chain at the scene of the murders in Mandy’s home, which was worn by the killer. Morris swore on his children’s lives that the chain was not his. Weeks before the first trial, the police found paint between the links of the chain which forensically matched the paint on Morris’s kitchen units/worktops and it was only then that Morris admitted that the chain was his. It was then that Morris made up his alibi for being at Mandy’s that morning.”

The statement added: “Morris’s claim that he was having an affair with Mandy was the foundation of his alibi but this was totally untrue, he was not having an affair with Mandy and was not with her that Friday morning. Phone records and witness statements given in court proved beyond doubt that Morris was not in Mandy’s home that morning. This totally destroyed Morris’s alibi and hence his explanation as to how his chain was found at the murder scene.

“On 28th June 2002, Morris was found guilty and sentenced to life in prison.


“Morris then won an appeal based on a conflict of interest only, no new evidence being presented at this hearing.

“The re-trial took place at Newport Crown Court. During this time, we again had to look at Morris and listen to lie after lie. Again, Morris was found guilty. Sitting through both trials and having to listen to what our family went through that night was heart-breaking beyond belief.

“In October last year, a BBC documentary was aired in which Morris’s family and supporters called for an independent review and further forensic testing of various items, including the sock which was found at the scene and which had clearly been used by the killer. Also, this programme contained misleading information which has fuelled further irrelevant questions by the public, an example of which is the statement that Mandy’s body was taken to the bathroom and washed. This is utter nonsense and never happened.

“Scientific testing has come a long way in the last 22 years and on October 18th the police confirmed there was scientific evidence of David Morris on the sock; sadly Morris’s family and supporters are refusing to accept these latest findings done by an independent forensic laboratory, which is what they called for!

“We now feel that it is time that they accept that Morris murdered our family and finally let them rest in peace.”

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Historic canal route set to welcome more cyclists and walkers




black and blue bicycle handle bar

An historic canal route in Swansea, already popular with walkers and cyclists, is set to be upgraded.

Swansea Council has secured funding to upgrade a 1.4km section of towpath along Swansea Canal.

The route between Clydach and Pontardawe is already part of the national cycle network (NCN 43) and sees many people using it to walk and travel by bicycle. Overgrown vegetation and an ageing surface under foot has prompted the council to seek further funding to make it more user-friendly.

A £250,000 investment via the Welsh Government Active Travel programme has now been secured and will result in a major upgrade to the route.

Mark Thomas, Cabinet Member for Environment Enhancement and Infrastructure Management, said: “Our aim will be to widen the existing path along the canal and provide an improved surface for walkers and cyclists.

“We will be working with the Canal and River Trust to make this route a safer and an even more popular walking and cycling route. We also want to continue the improvements already completed by the neighbouring local authority along their section, link up with it and maximise the regional benefits.”

The latest funding features as part of a report to the Council’s Cabinet, recommending approval of the scheme along with further investment in walking and cycling infrastructure, totalling £696,000.

Part of the funding (£245,000) will also help create a new 1.4 km link between the communities of Clydach and Craig Cefn Parc.


Additional investment will be spent on the introduction of locally produced artwork along existing sections of the city’s network.

Cllr Thomas, added: “We’re extremely grateful for the support from the Welsh Government in enabling us to expand and improve our current walking and cycling infrastructure.

“We want more people to consider the options of walking and cycling to travel around Swansea and to use a car less often. Making sure we have good quality routes which link up communities and give people confidence to travel safely is key to achieving this.”

Welsh Government Deputy Minister for Climate Change, with a responsibility for Transport, Lee Waters said: “We know that getting people out of cars for short journeys to cycle or walk is an ambitious agenda, but if we’re to meet our net zero carbon emission target by 2050 we need to take action now.

“Having the right infrastructure in place is key to encouraging more people to feel safe to walk and cycle and that’s why we’ve committed to investing significant funding in active travel this year.”

(Lead image: Markus Spiske /

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