Five months after he was found stabbed to death on a riverbank, detectives say they're still not sure whether high flying Durham solicitor Peter Maine was murdered or took his own life.
And now after months of exhaustive inquiries they're trying to trace three mystery figures who could hold the answers.
Watch Gregg Easteal's report here.
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It's been confirmed that the Marks and Spencer stores in both Stockton and Darlington will close in August.
It's part of the investigation into the disappearance of Donna Keogh from Middlesbrough in 1998 when she was just 17 years old.
The move is likely to lead to the loss of more than 1,500 jobs.