THE investigation into the disappearance of Madeleine McCann has taken a dramatic twist with last night's announcement that police say they have discovered firm DNA evidence that her body was in the boot of the family's hire car.

This has been a heartbreaking saga which has touched millions of people since Madeleine disappeared in Portugal more than four months ago.

The way the investigation has been conducted by Portuguese police can not have filled anyone with confidence. Indeed, at times, it has bordered on the shambolic.

Of course, it is not appropriate for us to voice an opinion on whether Gerry and Kate McCann are guilty of being involved in their daughter's disappearance and probable death.

In recent weeks, they have been the subject of increasing leaks from police sources which have left a cloud of suspicion hanging over them. It is an uncomfortable and unsatisfactory situation for everyone concerned and the sooner their position is clarified - one way or another - the better.

Whatever the eventual outcome, this tragic story is a reminder that the British justice system - for all that it is often criticised - has a lot going for it.

Its bedrock is the principle that one is innocent until proven guilty - and that is something to be cherished at all costs.