By brother, Fergus McInnes, went missing in Geneva, Switzerland, on Tuesday 9 September 2014.
He was due to attend a work conference in the Swiss town of Martigny the following day, and to meet his colleagues that evening for a meal.
He boarded the 09:35 EasyJet flight at Edinburgh airport and was seen on CCTV in Geneva airport around 13:00, where he bought a train ticket that we believe was a return to Martigny.
Nothing has been seen of him since.
He did not arrive at the meeting point that evening to go for a meal, he did not check into his hotel room and he did not appear at the conference. He also failed to catch his return flight to Edinburgh on 11 September.
His mobile phone has not been switched on since he switched it off for the flight, nor has he checked his emails since the morning of Tuesday 9 September. The last bank transaction he made was the purchase of a train ticket in Geneva airport when he used a debit card.
One of his colleagues who attended the conference in Martigny reported him missing to the Scottish Police, and they launched a missing person inquiry. Shortly after that it became a separate Swiss inquiry, and both inquiries are ongoing.
We are all utterly mystified about his disappearance and, with a lack of clues about where he might have gone or what might have happened to him, we fall back on endless and wide-ranging theories.
Friends of his have set up a blog called Missing Fergus McInnes, to keep people updated on the investigation into his disappearance. You can get to it by clicking on the blog name below:
They are monitoring all comments, and passing anything that might be relevant on to the police.
It’s now been over three weeks since he disappeared and, despite media campaigns in Switzerland and France, as well as in the UK, there is no indication of where he might be.
The blog contains a list of unanswered questions, which we dearly wish we could get answers to.
The police in both Switzerland and Scotland are doing all they can to discover what happened to him after he was last seen in Geneva.
We remain hopeful of a good outcome.