A man wrongly convicted of murder has launched a High Court challenge over a decision not to charge a police officer with perjury and conspiracy to pervert the course of justice.
Michael O'Brien and two other men spent 11 years in jail after they were wrongly found guilty of killing Cardiff newsagent Phillip Saunders, 52.
Known as one of the Cardiff Newsagent Three, Mr O'Brien was convicted in 1988. He was cleared on appeal in 1999 along with Darren Hall and Ellis Sherwood.
Today Mr O'Brien applied for judicial review of a Crown Prosecution Service (CPS) decision that there was insufficient evidence to charge the police officer.
The application is being heard at London's High Court by the Lord Chief Justice, Lord Thomas, who is sitting with Mr Justice Irwin.
Lord Thomas told Heather Williams QC, appearing for Mr O'Brien: "The key issue we have to consider is whether the decision that has been made by the CPS was one no reasonable prosecutor would have reached."
Ms Williams is arguing the CPS decision was "perverse" because of a failure to take into account relevant matters and a flawed information-gathering process.
Lord Thomas ruled that the press and media can report the fact that Mr O'Brien's application is being made to the court, but not the details of the case.
The judge said reporting restrictions were "in the interests of justice" because, if the application is successful and the decision has to be reconsidered, a prosecution could follow.
There was "a serious risk" that any reporting of the details of the case would prejudice any future prosecution, "if that is what is decided on", said the judge.
Mr Saunders died five days after being attacked and robbed close to his home in Canton, Cardiff in October 1987.
He had returned home in his van after working at his newsagent kiosk at Cardiff bus station and suffered a fractured skull.
The jailing of the Cardiff Newsagent Three for the killing is regarded as one of the country's most notorious miscarriages of justice cases.
The officer the CPS refused to prosecute was later named as former detective inspector Stuart Lewis, who was involved in investigating the murder of Mr Saunders.
Apart from the three men wrongly convicted, no-one has ever been charged or convicted of the killing.
The judges said they would take time to consider their decision and hand down a full written judgment at a later date.
Lord Thomas said people were entitled to a full account "bearing in mind this matter has been going on since 1987 and obviously caused a great deal of controversy in South Wales".