Police have released CCTV of the last moments of Teesside solicitor Peter Maine's life, just minutes before he died from stab wounds while jogging in Durham.
The footage reveals the last-known sighting of Mr Maine, whose death remains a mystery.
Last night poster appeals went up across the city, as police continue to try establish whether he was murdered.
Watch the full report from Dan Ashby below.
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Sandiford, a former legal secretary originally from Redcar, was convicted of drug smuggling offences and sentenced to death in 2013.