Detectives investigating the fatal stabbing of an 83-year-old grandfather have arrested a man on suspicion of murder.
Peter Wrighton, from The Moor, Banham, Norfolk, was attacked while walking his two dogs last weekend.
His body was found in woodland near the village of East Harling last weekend with stab wounds to the neck and head.
Norfolk Police said a man in his 20s from the area was arrested on Saturday morning and is being held in police custody.
A post-mortem examination determined the victim died of multiple stab wounds.
Detectives have released CCTV footage of the last known sighting of retired BT engineer Mr Wrighton, in Kenninghall Post Office between 10.08am and 10.12am on Saturday.
He then drove his red Skoda Fabia car around 4.5 miles to The Street, close to the woodland where he walked his dogs Dylan and Gemma.
His body was found by a member of the public at 10.46am.
Detective Superintendent Andy Smith, who is overseeing the investigation, said on Friday that more than 220 people had been in touch to date, and officers will be "exploring all avenues".
Search teams have utilised metal detectors and dogs. More than 100 officers and staff are working on the inquiry.
Anyone with information is asked to contact police on 0800 056 0944 or 0207 158 0010, quoting Operation Graduate.