Man convicted of the Clydach murders David Morris has died in prison
David Morris, the man who was serving four life sentences for the murders of a Swansea family, has died in prison the Prison Service has announced.
He spent 22 years in jail for killing Mandy Power, her daughters Katie, 10, and Emily, aged eight, and her 80-year-old mother Doris Dawson in 1999.
All four had been bludgeoned to death with a pole before their house was set on fire.
A Prison Service spokesperson confirmed Mr Morris had died.
"HMP Long Lartin prisoner David Morris died on August 20. The Prisons and Probation Ombudsman has been informed," a statement said.
The Ministry of Justice has not confirmed the cause of his death.
Morris was serving 32 years at Long Lartin Prison in Worcestershire having been convicted for a second time of their murders in 2006
He continued to maintain his innocence.
A bid to take his case to the Court of Appeal was rejected in 2018 by the Criminal Cases Review Commission.
Morris had long maintained his innocence and last year a programme by BBC Wales Investigates questioned the safety of the conviction.
It featured interviews with two potential witnesses - one who said he had never spoken to police and the other who said he contacted police to report what he had seen but nobody ever called him back.
South Wales Police said they had spoken to the two men and sought advice from the Crown Prosecution Service, who said no information had been provided that undermined Morris's conviction.
Morris was arrested after the finger of suspicion wrongly pointed to Ms Power's lover, Alison Lewis.
Former policewoman Ms Lewis and her former husband Stephen, an officer with South Wales Police, were arrested on suspicion of murder a year after the deaths.
Mr Lewis's brother Stuart, also a police officer, was arrested on suspicion of perverting the course of justice. They were all released without charge.
The Clydach inquiry was the largest and most complex murder investigation ever undertaken by a Welsh police force.