A GLASGOW man who tried to murder his ill father after a drug-induced psychotic episode from a "legal high" has been jailed for four years.

Christopher Tait, from Knightswood, repeatedly stabbed his father Gordon, 55, who suffers from multiple sclerosis, after pouncing on him as he slept.

A court heard that the 27-year-old did not speak during the attack but according to the victim "stared right through him".

Tait had bought the drug, said to be similar to the Class A hallucinogen LSD, for £27 over the internet from Spain.

The High Court in Edinburgh heard that the father had wakened in his at his home in Rowena Avenue, in Knightswood, to find his son standing over him. He started to lash out at Mr Tait who realised his son was stabbing him with a knife.

The victim tried to defend himself but the assault continued.

Advocate depute Bill McVicar told the court: "According to the victim the accused did not speak to him during this attack but was making a loud continuous sound throughout.

"The victim was in fear of his life and managed to struggle out of his bed and tried to defend himself.

"At this time he noticed he was covered in blood."

Tait stopped the attack and left the bedroom and the victim struggled over to a window and began shouting for help.

But moments later Tait returned still armed with the knife and resumed the assault.

His father grabbed the knife and shouted at his son: "Christopher you are killing me."

Neighbours, alerted by screams, managed to force the front door of the house and went to the aid of the attack victim, the court heard.

Lord Turnbull ordered that in addition to the prison term Tait should be under supervision for a further two years during which he may have to undertake counselling.