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.