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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Stockton Stages takes place from Thursday, July 20 to Saturday, July 22 in Stockton town centre.
Kerrie brings you Saturday's pollen forecast
Kerrie brings you Saturday's forecast