A man who superimposed his own face on to child sex abuse pictures has been jailed.

James Boyack's home on Clepington Road Dundee was raided following intelligence he was in possession of indecent images of children.

E-crime police found hundreds of indecent images and videos, including pictures in which Boyack had digitally added his own face over the top of the men seen in the images.

A sheriff told Boyack: "It is an aggravating factor that you superimposed these images - custody is inevitable."

Fiscal depute Eilidh Robertson told Dundee Sheriff Court that following his arrest on those charges in October 2014 Boyack moved to Bannockburn Road in Stirling.

He was then raided again in June last year and was again found in possession of child abuse images.

Boyack's offences came after he received a two and a half year jail term in 1998 for abusing a three-year-old girl and making "composite" photographs by taking videos of unsuspecting children and turning them into abuse images.

Miss Robertson told the court: "He fully admitted having downloaded indecent images of children.

"He stated that this behaviour made him feel ashamed and that he would frequently wipe his computer's memory to remove the temptation, before downloading further images."

The court heard 97 images and 18 videos were at the most severe end of the scale for child abuse, across eight devices at the two locations.

Miss Robertson added: "The internet search history of the laptop was consistent with the accused actively searching for indecent images of children."

Boyack, 70, now of Inverness, pleaded guilty on indictment to charges under the Sexual Offences (Scotland) Act.

Defence solicitor Iain Myles said: "He recognises that these are serious offences. He has told me that he is in no position to make excuses for his behaviour. He indicates that he needs help and realises this is totally and utterly unacceptable behaviour."

Sheriff Lorna Drummond QC jailed Boyack for 12 months and imposed a two-year extended sentence meaning he will be monitored in the community upon his release.

Boyack was also placed on the sex offenders register for 10 years.

The sheriff said: "The number of images you had, the time period in which you downloaded them and your previous conviction are all highly relevant.

"It is an aggravating factor that you superimposed these images and deleted them to try to conceal the evidence.

"It is clear to me that in a situation like this, and where you have a previous conviction, custody is inevitable."