Killer's assessment to continue

Harrison was ordered to be detained at Carstairs for another 12 weeks

A farm worker who admitted strangling a prostitute and dumping her body in a field has been sent back to Carstairs s State Hospital for a further 12 weeks.

Joseph Harrison, 28, admitted killing 21-year-old mother Susan Third, after losing control when she offered him sex in an Aberdeen street.

At the High Court in Edinburgh, Harrison's defence said it could take up to a year for him to be assessed.

The case will be called again at the High Court in Kilmarnock on 4 April.

The father-of-three had originally been charged with Miss Third's murder but his plea of guilty to the reduced charge of culpable homicide on the grounds of diminished responsibility was accepted by the Crown.

Sexual contact

The High Court in Aberdeen heard in October that Harrison, from Brechin, suffers from either schizophrenia or drug-induced psychosis.

After dumping his victim's semi-naked body in a field near Stonehaven, he phoned his pregnant girlfriend and told her: "I have killed somebody."

Reports by pathologists suggested Miss Third had been strangled by a ligature such as a thin cord.

The court also heard that there was a 70% chance Harrison had sexual contact with the victim after she died.