Hurtle, I do get what you're saying about corruption in Dubai, and it may well be that Mr Matthew is innocent.
But the Telegraph, as far as I am aware, is a British newspaper: there would be nothing to stop them from focusing their initial article on what a tragedy Mrs Matthew's death is (however prominent her husband) and then run a series of articles about proof in the justice system.
Because, let's face it, the way this is reported is not just about Middle Eastern corruption (if that is indeed the case): it is about something in our own society, it is about how news are reported, it's about how we see people. And this trend does not just involve possibly-innocent-people caught up in a foreign system: the very same way of reporting is used of known killers.
It is about the language used: as the link provided ToElle shows, the victim becomes not the central figure but "the wife", her mother becomes "the mother in law".
In this article from the Guardian, 2 sons/brothers of 2 murdered women describe how they had to see their father (whom they knew to have been an abusive bully) described in the press as "a very, very nice man" who struggled to deal with the breakdown of his family.
www.theguardian.com/uk-news/2017/apr/22/man-mother-sister-killed-father-lance-hart-spalding-leicestershire
The British press don't actually have to have the ties they do to Mr Matthew, or the suspicions they may well have of his confessions, in order to describe a suspect as a lovely man and forget about the victim altogether: it's pretty well the default position for reporting a suspected wife murder.
And regardless of Mr Matthew's merits, that is wrong.
Here is an article about how two sons of a murdered mother + sister