The government should fund an investigation into the murders of more than 200 police officers during the Troubles, the Police Federation has said.
Widows of murdered officers want inquiries into unsolved murders
The group, which represents rank-and-file police, said on Monday that murdered officers and their families should be afforded the same respect as given in high-profile inquiries like the one into solicitor Pat Finucane's death.
Iona Meyer, chairman of the RUC Widows Association, said she had just as much right to find out who had killed her husband.
"I would like to know who murdered him - that's the big thing," she said.
"It's OK saying an organisation, but the final piece in the jigsaw, for me, would be knowing who it was."
In April, the UK's most senior police officer, Sir John Stevens, found rogue elements within the police and army in Northern Ireland helped loyalist paramilitaries to murder Catholics in the late 1980s.
He found members of the RUC and Army colluded with the UDA in the murder of high-profile Catholic solicitor Pat Finucane, who was shot dead by the UDA in front of his family at his home in 1989.
Retired Canadian judge Peter Cory has also been investigating collusion allegations in six of Northern Ireland's most controversial murders.
Pat Finucane was a high profile Belfast solicitor
He was appointed by London and Dublin to examine the murder of Catholic solicitors Mr Finucane and Rosemary Nelson, Lord Justice and Lady Gibson, RUC Chief Superintendent Harry Breen and Superintendent Bob Buchanan, Catholic Robert Hamill and loyalist paramilitary Billy Wright.
The name of the force was changed to the Police Service of Northern Ireland in November 2001 after 80 years as the RUC.
The change came about as part of reforms recommended by the Police Reform Commission, headed by former Hong Kong governor Chris Patten.