The family of private detective Daniel Morgan has called for a judicial inquiry after his murder case collapsed on the 24th anniversary of his death.
Mr Morgan, 37, a father-of-two from Monmouthshire, was found with an axe embedded in his skull outside the Golden Lion pub in Sydenham, south-east London, in March 1987.
No-one has been brought to justice despite five police inquiries.
His family have now called for a judicial review into the handling of the case saying the criminal justice service is “not fir for purpose”.
Five people were arrested in 2008 but charges against two of the defendants were discharged after a string of supergrasses were discredited.
The Crown Prosecution Service has now dropped the case against the remaining three people – Mr Morgan’s former business partner Jonathan Rees and brothers Garry and Glenn Vian.
Mr Morgan’s brother Alistair said: “For almost a quarter of a century, my family has done everything democratically and legally possible to secure justice for Daniel.
“For much of this time, we have encountered stubborn obstruction, and worse, at the highest levels of the Metropolitan Police.
“We have found an impotent police complaints system. And we have met with inertia, or worse, on the part of successive governments.
“We have been failed utterly by all of the institutions designed to protect us.
“We have seen for ourselves a criminal justice system which has proved incapable of coming to terms with the murder or the subsequent criminality of those charged with enforcing the law.”
But he said those responsible for the present inquiry and prosecution had done their best “to redress the catastrophic failures of earlier investigations”.
He added: “Despite their best efforts, there has been no public scrutiny of the evidence available in relation to Daniel’s murder.”