Peter Coshan: Police search for body of retired Edinburgh teacher in the Scottish Borders and the North of England
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Two men have been charged with the murder of Peter Coshan, but investigators have still not found the 75-year-old's body. It has been almost three weeks since he was last seen in the Seafield Road area of Edinburgh, on August 11.
On Wednesday, officers combed through land in the north of England in an attempt to find the body of the retired Fettes College biology teacher.
Detective Superintendent Andrew Patrick from Police Scotland said the search came after "extensive inquiries", with officers searching a "significant area".
He said: "We are following the evidence to focusing on specific areas and searching through those areas one at a time in a structured and organised manner, with specialists from Police Scotland, our search partners, and really deploying all available resources in an effort to find Peter."
The former biology teacher taught at the famous school until 2005, when he retired.
Mr Patrick said he could not confirm how many officers were currently involved in the search for Dr Coshan's body.
"This is obviously a very distressing time for Peter's family and our priority is to find him," he said.
"I'm appealing for anyone who may have been in the Scottish Borders and Northumberland, including travelling on the A7 or A68, or any other roads in these areas, during the hours of darkness on either Monday August 15 or Tuesday August 16 this year."
"That evening and the early morning was at the end of very hot weather that we have had and there was a warning for thunderstorms and I would ask anyone who's been in those areas to think back to that time.
"You may remember it because of the hot, unusual weather conditions and the thunderstorms that we had.
"I believe the areas of the Scottish Borders and Northumberland are key to helping us find Peter."
Detectives are also hunting for information about a "black or dark coloured 57 plate Vauxhall Vectra" that may have been seen in and around the area.