A jury in Scotland has unanimously found gay teenager Craig Roy guilty of the murder of Jack Frew in 2010.

Returning its verdict in Glasgow today, the jury rejected Roy’s argument that he was suffering from an undiagnosed personality disorder.

Roy had admitted causing the death of the gay schoolboy, who was found with 20 stab wounds and his throat cut in woodland over a year ago, but denied full responsibility for his actions.

Now 19, Roy said he had no memory of the attack itself.

A picture of the complicated relationship between Roy and Frew emerged during the trial.

The teenagers had been schoolmates at East Kilbride in South Lanarkshire.

Psychiatrist Dr Rajan Darjee told the court Roy had admitted having a sexual encounter with the murdered teen in January 2010.

The court previously heard Roy’s claim that he saw Frew as a threat to his new relationship, describing him as a “sex pest.”

The court had heard that Roy and Jack Frew met in woods on 6 May 2010 at the murdered teenager’s request.

Roy was said to have been concerned Frew, then 16, would tell his boyfriend about their sexual encounters and brought a knife to the meeting.

He told a psychiatrist Frew had exposed himself, but thereafter his memory failed.

Roy’s boyfriend Christopher Hannah, 20, a student at Glasgow Caledonian University, was the first person to arrive at the scene after being called by Roy.

The jury less than two hours to reach its verdict.

The BBC reported Jack Frew’s father saying Roy should “rot in hell”.

Roy will be sentenced on 1 March. Though he faces a mandatory life sentence, the minimum term he must spend in custody is yet to be determined.