A man stabbed two people to death after a vigil for a teenager.

Robert Stratton killed Julie McCash, 43, and 32-year-old David Sorrie during an altercation on Drumlanrig Drive, Dundee, on the evening of February 26, 2016.

Their deaths came after a get together for the family and friends of 18-year-old Ralph Smith, who lost his life after falling from cliffs in Arbroath the previous day.

As the evening progressed, Stratton's partner Lee Kinney got involved in an argument with fellow party goers.

The court heard Ms Kinney was assaulted in the street and had to run home.

She said she was scared the people who had beaten her up were going to break into her house.

However, rather than wait for the police to arrive, the court heard that Stratton left the property armed with two kitchen knives which he used to fatally stab Ms McCash and Mr Sorrie.

Stratton, 43, of Dundee, had claimed he acted in self defence.

But on Tuesday, jurors at the High Court in Edinburgh convicted Stratton of murdering Ms McCash.

They also convicted Stratton of the culpable homicide under provocation of Mr Sorrie.

Following the verdicts, prosecution lawyer Alex Prentice QC revealed that Stratton had previously been given a seven-year sentence at the High Court in Dunfermline for attempted murder.

Passing sentence, judge Lord Beckett told Stratton that he would have to serve 23-and-a-half years in jail before he would be eligible for parole.

The judge added: "The taking of two knives transformed a minor incident into two killings.

"For someone like you, with a previous conviction for attempted murder, who killed two people and in one case committed murder severe punishment is necessary."

Detective inspector Brian Geddes of Police Scotland said: "The terrible actions of Robert Stratton resulted in the deaths of Julie McCash and David Sorrie.

"I'd like to thank all of those persons, particularly those in the Mid Craigie community, who helped our investigation into this needless and tragic loss of both Julie and David.

"Our thoughts are with Julie and David's families, and their wide circle of friends. Their loss will be forever felt, but I hope this conviction brings some small degree of comfort to them."