Detectives questioning a man in his 20s on suspicion of murdering Peter Wrighton have been given extra time to interview him.
Norfolk Police said Superintendent had today authorised a further 12-hour detention whilst the investigation continues.
Detectives have also raided a house in the village of Cringleford, near Norwich, as they continue to question a man.
A police spokesman said of the search of the house in Cringleford: ‘We can say it’s one of a number of locations which are linked to the ongoing investigation.’
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The pensioner was a much-loved father and grandfather and his death has left the local community reeling in shock
Mr Wrighton was hacked to death in a crime so brutal that detectives at first assumed he had been mauled by an animal
Detectives questioning the man will need to make a decision on whether to charge him or not by Monday morning or seek a further application for more time from magistrates.
Police also revealed that they spoke with more than 700 people on Saturday as part of anniversary checks and have identified more witnesses as a result.
Detective Superintendent Andy Smith said: ‘We are extremely pleased and grateful for the response from the public yesterday at the scene which has helped us to identify further witnesses.
‘We have also been able to obtain extra dash cam footage which will be downloaded to assist in our enquiries.
Police vehicles including a forensics team van were photographed parked outside a house that was raided in connection with the probe
The £365,000in Cringleford is one of a number of places that are being probed in connection with the murder of Peter Wrighton
‘In addition, we have taken over 170 calls since Wednesday (August 9) from members of the public who believe they have further information and this is also greatly appreciated.
‘Again, I would like to stress how important the public have been in helpingus to identify potentially key witnesses who were seen in different areas close to the murder scene on Saturday 5 August.
‘We are still keen to hear from any members of the pubic who were in this area on the relevant day and who have yet to speak to us.’
Det Supt Andy Smith added: ‘We still have around 100 officers working in the area, providing reassurance, speaking with witnesses and conducting house to house and CCTV enquiries.
Police continue their search for evidence bout the murder of Peter Wrighton at woods south of East Harling, Norfolk
Left: Forensic officers are pictured searching an area of woodland as they hunt for evidence into the pensioner’s killing. Right: An officer questions a member of the public
‘We are also searching and forensically examining a number of locations which are linked to the ongoing investigation and you may see officers in other parts of the county.’
Detectives ask that anyone with information about the incident contact Norfolk Police immediately on 0800 056 0944 or 0207 158 0010, quoting Operation Graduate.
They can also visit the mobile police station or contact Crimestoppers anonymously on 0800 555 111.