The family of a man who died from a stab wound following a row with his girlfriend will call for a meeting with the Lord Advocate to challenge the police's conclusion that he committed suicide.
An independent review of the death of Colin Marr, 23, from Lochgelly in Fife, in 2007 by a former senior CID officer will be published today.
Liberal Democrat leader Willie Rennie and Mid Scotland and Fife Labour MSP John Park will write to Lord Advocate Frank Mulholland to request a meeting with Mr Marr's family.
The family has welcomed five key recommendations in the report, written by retired detective superintendent David Swindle, which they hope will lead to the discovery of the full events that led to Mr Marr's death.
The family has been provided with a copy of the report prior to its publication, and has found "criticisms" of Fife Police which allegedly call into question the force's conduct during investigation.
Their concerns about the force's conduct were amplified last week by the sentencing of a former Fife policeman who was jailed for five years for withholding evidence from prosecutors while investigating an unrelated murder 17 years ago.
Richard Munro, 53, was found guilty of attempting to defeat the ends of justice after a trial at the High Court in Edinburgh. As a detective inspector he led the investigation into the killing of Andrew Forsyth in Dunfermline in 1995.
Speaking in advance of the publication of the report, Mr Rennie said: "The Crown Office Cold Case Review Unit commissioned the services of DCI Swindle to review this case. The family is happy with the findings of the report, but their one point of dispute is who should carry out the future work on this case.
"Fife Police has been heavily criticised by a number of different organisations in the past and now in this report, and when you add in the conviction last week the family has really lost confidence in the force. Most people don't have any confidence that it was a suicide any more, particularly after the fatal accident inquiry (which was inconclusive). So we are going public with the findings of this report today to try to convince the Lord Advocate to agree that another force should investigate the outstanding questions in this case."
No one from Fife Police was available for comment.