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.
More top news
Victorian North Yorkshire railway station celebrates 150 years of operation
Newcastle International Airport has welcomed the recommendation by the Airports Commission that a third runway should be built at Heathrow.
Six former British soldiers, including three from this region, have been told today that they will go on trial in India on weapons charges.