Earlier this week, detectives released CCTV footage of the last known sighting of Mr Wrighton, a retired BT engineer, in Kenninghall Post Office between 10.08am and 10.12am on Saturday.
Wearing a black t-shirt and grey pants, footage released by Norfolk Constabulary shows him walking slowly towards the till to buy a few small items before heading on his way.
A man in his 20s has been arrested on suspicion of murder following the brutal stabbing of a pensioner in Norfolk.
Peter Wrighton, of Banham, was found dead in woodland on the morning of Saturday, August 5.
He said officers were appealing specifically to three men who police are yet to trace as potential witnesses. Were you in the area at the time?
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Speaking at a press conference at Norfolk Police's headquarters on Thursday, DS Smith appealed to people who may have been in the Harling Woods area.
He was believed to be wearing heavy-rimmed glasses and light-coloured pants, and was seen in The Street changing into a white t-shirt. He was seen in The Street changing into a white t-shirt. He is of athletic build with short dark wavy hair and dark eyes. The other, aged 30 to 50, was wearing dark clothing and seen walking without a dog to the north of the heathland where Mr Wrighton had been walking.
More than 100 officers are working on catching Mr Wrighton's killer and a dedicated phone line has been set up to deal with calls from members of the public who may have information which could help.
"When we think of Peter we remember him with with fond and happy memories that will stay with us always".
Ar 10.46am his body was discovered by a passerby near the Fiveways Junction.
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