A woman initially arrested as police investigated the Clydach murders has spoken to a new documentary about her arrest over the deaths of Mandy Power, her mother Doris and daughters Katie and Emily.
Alison Lewis said she feared for her life after being released on police bail and lay on the floor of a car driving her away from Morriston Police Station after being questioned by police about the deaths, with baying crowds gathered in front of the building.
In a four-part documentary series which begins next weekend, the former police officer and Mandy's lover exclusively told film-makers of her sheer terror that her life might be about to end.
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"I think the pubs had just closed and everyone descended on Morriston Police station...and they wanted my blood", she said.
"They were baying, screaming and shouting. The police covered me with equipment and blankets and things.
"There was a driver and a passenger there, and I heard him [the passenger] saying to the driver 'whatever you do don't stop. It does not matter what happens you do not stop'.
"He was frightened and I could hear the fear in his voice.
"I remember lying on the floor in the car thinking, 'I am going to die here, in the back of this car and I will not be able to prove I am innocent. I won't be able to show that I have not done this.
"I really thought that I was going to be killed."
Her memories were just some of a series of recollections which feature in Murder in the Valleys, which premieres on Sky Crime and NOW on Sunday, February 6.
The series examines the circumstances surrounding the brutal death of of Mandy Power, her daughters Katie and Emily, and mother Doris Dawson, who were killed at their home in Kelvin Road in Clydach in June 1999, before their home was set ablaze.
David 'Dai' Morris was twice convicted of the multiple killings, but his family have always maintained his innocence and continue to fight to clear his name after he died in prison last August. Other contributors including the then crown prosecutor and members of Dai Morris' defence team, who share their opinions on what really happened in the quiet residential twenty years ago, as well as neighbours and one of the village's local councillors.
There are also interviews with fire fighters who are still clearly traumatised after entering the property on the night of the murders and discovering the four lifeless bodies; as well as a forensic investigator who worked on the case.
Dai Morris' sister also speaks exclusively to the series.
In it, she says: "If I thought for one minute my brother was the Clydach murderer, he would be dead to me.
"People ask me if I'm sticking by him through blind faith but I'm not ignoring anything. I know my brother. I know my brother 100% like he knows me. Inside out.
"Yes he used to get into trouble, we have never tried to paint a perfect picture of my brother. But he's not the monster that they made him out to be".
Dai Morris' family have been campaigning for what they say is fresh evidence to be examined in their bid to overturn his conviction.
The show also shines a light on the investigation into Alison Lewis' husband Stephen, who was also a serving police officer, and his twin brother Stuart, who was the most senior police officer on duty on the night of the killings, but who left the scene just minutes after turning up in Kelvin Road, and failing to properly secure the scene.
The married couple were arrested on suspicion of murder and Stuart on suspicion of perverting the course of justice, but were released without charge.
Mandy Power's family say they believe the right man was convicted of the crime, and Martyn Lloyd-Evans, who led the probe into the killings, insists the force found the right man.
"I have no doubt at all that David Morris is the killer. No doubt at all," he tells the film makers.
"This case has been looked at and looked at and explored. I am puzzled why people can't see Morris for what he is.
"Can you imagine anybody saying 'I am the monster that did this'? That is never going to happen".
Murder in the Valleys premieres on Sky Crime and NOW on Sunday, February 6.
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