A man who wrongly parked in a disabled parking space at a supermarket had his throat cut by a genuine disabled driver, a court has heard.
Williams was 'furious' at not finding a vacant parking bay
David Williams, 49, from Newport, slashed Christopher Barrell's throat with a four-inch knife at Tesco's in Cardiff Road, Newport.
Williams, a former civil servant, admitted causing actual bodily harm and having a bladed weapon in public.
Cardiff Crown Court imposed an 18-month sentence suspended for 18 months.
The court heard Williams, who was recovering from hospital treatment, was furious at not being able to find a disabled space in the supermarket's car park.
When he saw 42-year-old Mr Barrell sitting in a disabled bay without a permit, he jumped out of his car and shouted at him.
Mr Barrell replied: "Sorry, I won't be long," before Williams produced a four-inch lock knife."
Prosecuting, Harry Baker, said: "Williams reached into the car and slashed Mr Barrell's throat.
"Alarmingly, he went back to his car, lit a cigarette and waited 30 minutes for his wife to arrive."
Police arrested Williams after viewing CCTV footage from the supermarket and finding Mr Barrell's blood on the lock-knife.
He said Mr Barrell had been "cheeky" but alleged he could not remember the assault.
Defending, Simon Goodman said: "His memory of the incident is completely blank."
The court heard Williams, his wife and son were all registered disabled, and Williams's medical problems included depression and treatment for psychiatric illness.
Sentencing, Judge Roderick Denyer said: "If you put a knife to a person's neck there is a serious risk of killing them.
"Your wife and son are also disabled and you have to care for them.
"If I locked you up it would have a devastating effect on them."