A reward of up to £20,000 is being offered following the murder of a Lithuanian man in Romford.
The Metropolitan Police Service is now offering up to £20,000 for information leading to the identification, arrest and prosecution of the anyone responsible for the murder of Evaldas Svolkinas.
The 34-year-olds body was found in a stream near Wincanton Road, Romford on Sunday 16 December 2012
Mr Svolkinas of Dorking Rise, Romford, died from severe head injuries.
It is believed he could have been murdered after owing significant amounts of money in gambling debts.
Mr Svolkinas is believed to have left his home address at around 6am on Thursday December 13 2012.
He failed to attend work that day and was reported missing to police the following day. He was wearing grey combat style trousers, a dark blue coat and blue trainers.
Police made extensive enquiries as his disappearance was totally out of character.
Investigating officer DCI Chris Jones said: "We are anxious to trace the victim's movements between the Thursday morning and when he was found on Sunday.
"Did you see him? Do you have any information? If so, please come forward."
In January 2013 detectives released an image of a rucksack identical to the one owned by Mr. Svolkinas.
The bag is yet to be traced and officers believe tracing it may hold valuable information about what happened to Mr Svolkinas
DCI Jones said: 'We believe the victim was in possession of his rucksack at the time of his death.
"This has not been located and we would appeal to any person who may have seen or have information as to its current whereabouts to contact the investigation team.
"The rucksack has three small silver images of 'power tools' at the top of the bag and the word 'Festool' embossed in the black section toward its base.
"Mr Svolkinas was a well-known member of the Lithuanian community in East London. He worked within the construction industry and employed members from his community to work on projects in the South East.
"Investigations have established that he was a frequent gambler which led to him experiencing significant financial troubles, owing monies to numerous persons. This is a line of enquiry we are exploring and I would appeal to any person, specifically members of the Lithuanian community who may have information on what happened to Mr Svolkinas, or his lifestyle, to contact the investigation team."
Anyone with information is asked to contact the incident room on 020 8345 3734; if you wish to remain anonymous please call Crimestoppers on 0800 555 111.