A man serving life for strangling his doctor wife should stand trial again, appeal judges have ordered.
Nabeel Khan, 45, was found guilty in August 2009 of murdering pathologist Iffat Kamal and was told he would spend at least 15 years in prison.
But appeal judges have now ruled Khan suffered a miscarriage of justice.
They said the trial judge, Lord Hardie, had misdirected the jury over the differences between murder and culpable homicide.
Giving their decision, Lord Justice Clerk Lord Gill said how the jury reached their decision was "a matter of speculation".
But he said the way Lord Hardie had asked jurors to consider their verdict could have affected the outcome of the trial.
After the ruling that Khan had suffered a miscarriage of justice, advocate depute Alex Prentice QC asked Lord Gill, sitting with Lords Eassie and Bonomy, to order a fresh trial and they agreed.
No date has yet been fixed for Khan to return to court.
Consultant pathologist Dr Kamal, 39, died in Dundee's Ninewells Hospital where she worked, 10 days after an attack in her home in the city's Simpson Court on 10 December 2008.
Jailing Nabeel Khan for life, Lord Hardie described the murdered woman as "a successful, dedicated pathologist".
The trial last year heard that Khan had a gambling habit and told a psychiatrist he had lost £17,000 playing online poker and other forms of betting and also used his wife's credit card while she was in India.
Pakistan-born Khan, who is a German citizen, was said to have slapped Dr Kamal and then fatally throttled her by putting his arm around her neck.