A MATHS teacher who performed sex acts on a schoolboy has been jailed for two years.

Craig Walker, 41, carried out the abusive behaviour towards the 15-year-old four times last year after the victim had left St Andrews Academy in Paisley to study at the town's Reid Kerr College. Walker had remained his tutor during this period.

Paisley Sheriff Court heard how Walker took him for occasional drives, would talk about his sex life and gave him alcohol.

In May last year, Walker became more intimate with the teenager.

Giving evidence from behind protective screens, the witness said: "He approached me. It wouldn't have happened if he had not started it.

"I trusted him and thought he was there to help me."

Walker guilty to the charge relating to the former school pupil.

Another male, who had been befriended by the accused when he was a vulnerable teenager in care, told how he had been indecently assaulted by Walker after he was released from care between 2006 and 2012.

Walker indecently assaulted him at first when he was 17 age and on several occasions by touching him while he lay asleep in an intoxicated state between 2006 and 2012.

The victim, now aged 26, had met the tutor as part of a social work programme designed to bring stability into troubled young people.

He was convicted by majority of two separate charges in this case.

He said Walker was his "confidant" but his abuse had left him "terrified."

On that first occasion when Walker acted inappropriately, he felt that he had wanted to test him "to see how far it would go."

"I felt confused. I was just out of a children's home."

Sheriff Seith Ireland said that due to the gravity of the offences, custody could not be avoided. Walker, of Lochwinnoch, faces serving an additional two years in prison if he re-offends after release.