By Inzamam Rashid, news correspondent, and Sunita Patel-Carstairs, news reporter
The father of Streatham terrorist Sudesh Amman has told Sky News he spoke to his son a day before the attack and told him "not to be naughty".
Faraz Khan, who left the UK three months ago, said he learned about his son's death from a cousin who messaged him.
Amman was under police surveillance when he stabbed two people in south London while wearing a fake suicide vest before he was shot dead by officers.
"I spoke to Sudesh one day before he passed away. I didn't know he had become radicalised," said Mr Khan.
He said his son spoke to him about religion and Islam: "He was reciting the Quran to me and he was translating that to me.
"He's never spoken to me about these kind of things. He would never talk to me about naughty things.
"I heard they found a lot of things and I saw them on the news, but I never thought he would go this far."
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Mr Khan said he had "nothing bad to say about him" and described Amman as "a very calm and very good boy".
"He got angry," he laughed. "Nothing else."
Amman was jailed for three years and four months at the Old Bailey in central London in December 2018 for possessing and distributing terrorist documents.
The 20-year-old from Harrow, northwest London, was released from prison on 23 January after serving time for spreading extremist material.
He had been staying at a bail hostel near to where he carried out Sunday's attack.
Police said witness statements suggested he stole a knife from a shop to carry out the stabbings.
One man, in his 40s, remains in a serious but stable condition. A teacher in her 50s who was also attacked has since been discharged from hospital.
Mr Khan said he never visited his son when he was in prison, and was "shocked" when he found out about the stabbings.
"He never talked to me about things like that. He said when his mother came to see him she brought him food – that's the kind of things he talked about.
"I told hRead More – Source