A woman and two men who killed a man by stabbing him 26 times before he was burned by fire have been jailed.

Oil worker Steven Donaldson, 27, was knifed while his jaw was broken with a suspected baseball bat after being bundled into a car in Kirriemuir, Angus.

He tried to escape, but his spinal chord was severed in two places by a weapon such as a sword or a machete - and then both he and his car were set on fire last June.

Steven Dickie and Callum Davidson, both 24, were each jailed for life with a minimum of 23 and 24 years after murdering Mr Donaldson.

Their co-accused and Mr Donaldson's ex-girlfriend, Tasmin Glass, 20, was sentenced to ten years in prison after being convicted of culpable homicide.

Passing sentence, Lord Pentland said Dickie and Davidson used "extreme violence" in a "sustained and prolonged" attack on their victim.

He said: "He had many years left to look forward to. You cut him down without mercy.

"I do not accept that you demonstrate genuine insight and empathy. You show callous disregard for Mr Donaldson family.

"What I am left with is a clear picture that you are both cold blooded, violent and unrepentant."

He told Glass she lured Mr Donaldson to the place where he was attacked and eventually lost his life.

Lord Pentland added: "You returned home where you continued to go on with your normal routine. You showed a chilling coolness.

"You are manipulative and devious in advancing your own interests."

Glass had lured her ex-boyfriend Mr Donaldson into the hands of Dickie and Davidson at a play park in Arbroath.

When his body was found at Loch of Kinnordy nature reserve, he had suffered 26 stab wounds and his spinal chord had been severed in two places.

Chief inspector Andrew Patrick: "First and foremost our thoughts are with the family and friends of Steven Donaldson, who was the innocent victim of this brutal murder.

"They have shown great bravery and dignity throughout their terrible ordeal.

"I would also like to thank the community in Angus who have assisted us and shown patience while we carried out our investigation.

"There was understandably a considerable amount of concern following this horrific crime and we appreciate their cooperation while we conducted our enquiries.

"I hope they feel that bit safer knowing that these violent individuals are now off the streets."