What we are about to reveal has been "suspected" for some time... That despite numerous denials, crucial colour photographs which could throw vital light on the case do, in fact exist.
Over the past two years, Today Tonight has raised serious doubts about the way the death of Anna Jane Cheney was investigated.
And after years of political resistance from all sides, Premier Mike Rann has now referred the case to the Solicitor General for review.
Tonight, we also have evidence that the murder scenario proposed by the prosecution would have been almost physically impossible... and that evidence has been altered.
All this, together with the revelation of the missing photos, has been enough for Henry Keogh's lawyers to call for a police investigation into the matter.