Sock links Dai Morris to scene of 1999 Clydach murders, police say

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A blood-stained sock connects a man convicted of murdering four family members to the scene of crimes, a new review shows forensic evidence found during the show.

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David “Die” Morris – who died in prison in August at the age of 59 – was found guilty in the 2000s of two trials for the murder of 34-year-old Mandy Power, with whom he was in a relationship.

He was also convicted of killing his two daughters – 10-year-old Katie and eight-year-old Emily – and his 80-year-old mother Doris Dawson at their home in Clydeuch, on the outskirts of Swansea. 27 June 1999.


The murders of women and girls inspired the largest and most complex police investigation ever conducted by a Welsh police force.

Mandy Power with her kids Katie and Emily

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Mandy Power with her kids Katie and Emily

Morris was alleged to have committed the murders after Ms Power denied her sexual advances. Swansea Crown Court had heard that he tried to set the house on fire to destroy any evidence.

At the time, there was no fingerprint or DNA evidence linking him to the crimes.

But in 2020 following requests by Morris’ representatives to release some of the demonstrations, South Wales Police agreed to appoint an independent senior investigative officer and forensic laboratory to oversee a review of the case’s material.

Police now say that an investigation of the sock, widely accepted as being used by the perpetrator during the murders, identified the presence of a mixed *Y-STR profile that could characterize Morris, or a male relative of his paternal lineage. Links to crime scene.

Scientists have said it cannot be determined how or when the gender-specific profile was transferred onto the sock, but the DNA is more likely than Morris’s not.

Operation Dolomite was led by detectives Steve Carey and Ian Ringrose and police forensics specialist David Lloyd of Devon and Cornwall Police. The independent forensic science laboratory Selmark Forensic Services was commissioned to perform the forensic work.

After his death on August 20 this year, Morris’s family had given permission for his blood samples to be taken so that he could be tested.

Police say the accounts provided by two witnesses featured in the BBC documentary Beyond Reasonable Doubt were also investigated, but the information gathered did not weaken the case against Morris.

Det Carey said: “The outcome of the completion of the forensic evaluation and further actions has not established any information undermining Morris’ sentence.

“In my view, as an independent senior investigative officer, the new findings from samples taken from sock support the existing evidence that originally convicted him.”

Morris, who was a 40-year-old builder at the time of his first trial, was sentenced to four life sentences in 2002 after being found guilty by a unanimous jury decision.

His sentence was later annulled on appeal by the defense lawyer due to a conflict of interest.

But in 2006 he was found guilty again in a trial at Newport Crown Court and sentenced to life imprisonment.

The Criminal Cases Review Commission had reviewed the case as recently as 2018, but found no new evidence and decided not to refer it to the Court of Appeal.

South Wales Police Assistant Chief Constable David Thorne said he hoped the new evidence would answer and close those who are seeking it.

He continued: “Specifically, those who have lost three generations of the same family and have had to revisit those painful memories over and over again over the past two decades.”


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