The driver, 26, is believed to have used his blue Renault Clio to run over a 41-year-old hooded knifeman on the pavement in a bid to stop the frenzied assault at about 9am yesterday.
He was arrested on suspicion of murder but has been bailed by detectives pending further investigation.
Children and parents on the school run witnessed the double killing in Maida Vale, west London.
Today, one of the 43-year-old victim’s sons joined mourners laying flowers at the scene and said: “She didn’t deserve to die. Please keep her in your prayers. Everyone who knew her knew she was a good person.”
Relatives named her as Wafah Chkaifi and said she had two boys, aged 16 and 18. An aunt, Haida, added: “She had a heart of gold, was beautiful and had friends from all cultures.
“Her mother is in hospital. She was taken in after she was given the news. We are struggling to cope.”
The victim was stabbed multiple times by a man known to her in Chippenham Road. Witnesses tried to intervene to save her, but she was knifed up to 10 times by the attacker who allegedly shouted “take it” and “nobody come to me”.
A witness, Mulugeta Asseratte, said the car then “hit both of them”.
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