A pensioner has been found guilty of attempted murder after a stabbing spree in a supermarket car park.
Ethem Orhon,67, was also found guilty of two counts of wounding with intent to cause grievous bodily harm.
Orhon said the random attacks in the car park of Sainsbury's near his home in Hampton, west London, on 20 May had been sparked after he had felt humiliated by police who had arrested him the previous day for possession of another knife.
Orhon said he was "like a zombie" and felt as though he was "hypnotised" as he prowled silently around the car park armed with a Leatherman knife.
Victims Suzanna Brand, 53, Janet Morsy, 63, Jean Sullivan, 68, and Charandasi Chandiramani, 71, suffered serious injuries.
Ms Brand, who has learning difficulties, was hit from behind, struck 13 times and left with two collapsed lungs.
A screaming Ms Morsy thought she was going to die as she was struck in the arm and chest and tried to defend herself.
Although she begged Orhon not to hurt her, he stabbed her anyway.
Ms Sullivan was stabbed in the back causing damage to her chest wall, right lung and liver and Ms Chandiramani was stabbed twice in the back.
Orhon told Kingston Crown Court he remembered assaulting one person and following two men.
They turned out to be schoolboys from Hampton Grammar who warned other passers-by that he was armed and dangerous,
They also distracted Orhon and called 999.
Orhon said he had "no memory" of going to the car park or of the stabbings.
But the court was shown footage from his police interviews in which he said he had "rushed" at someone in the car park and he remembered "stabbing someone in the back".
Consultant forensic psychiatrist Dr Philip Joseph said that Orhon, who had no previous contact with the medical services, is suffering from paranoid psychosis which may put a person out of touch with reality.
Orhon had returned home from central London that day after he had been charged with having a bladed article in a public place.
After being released on bail, Orhon went home and picked up his Leatherman knife and went on his stabbing spree.
Orhon is a retired odd-job man from Turkey who came to Britain in 1989.
The court was told he briefly married but has no children and spent a lot of time in the library.
He said he had no friends, does not have a GP and does not get depressed or angry.