Father-to-be Danny Gough, 24, was hacked to death in front of his fiancee in Croydon, south London, on December 15, 2010.
He was at the home of his pregnant girlfriend Kareena Modashia in Stockbury Road when three men burst in during the early hours of the morning.
Police arrived at around 1.35am to find him lying in a pool of blood and he was pronounced dead at the scene. A post-mortem examination gave the cause of death as shock and haemorrhage from multiple wounds.
He had suffered stab wounds and deep cuts to his legs inflicted with a bladed weapon like a machete or axe.
On November 17, 2012, Stephen Dougherty, 34, [4/06/78], of no fixed address, was charged with murder. The prosecution case is that he is linked to the crime by forensic and mobile phone evidence and left for Spain shortly after the murder. Two more suspects were charged with murder on April 4: Sam Monteith [1/8/81] of no fixed address and Paul West, 29 [7/1/84], of Eaton Avenue, Slough.
In January 2014 an Old Bailey jury failed to reach verdicts in the case. The retrial began on 5 November 2014.
Contact the incident room on 020 8721 4155 or Crimestoppers on 0800 555 111.