Officers investigating have now said they think he remonstrated with youths who were throwing conkers at him, at around 7pm on Wednesday, August 31. Neighbours rushed outside after hearing an argument in the street, and found Mr Grisales slumped on the ground bleeding heavily.
He was rushed to hospital but died the following day.
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Two 15-year-old boys were arrested on Monday in connection with the murder. They remain in custody.
A 19-year-old man and a 16-year-old girl have also been questioned and released on bail until next month.
and a bit more info, 2 min BBC news video...
A 15-year-old boy has been charged with the murder of a man who police said was attacked after confronting a group about having conkers thrown at him.
Student Steven Grisales, 21, was pelted with the missiles as he walked to Silver Street station in Edmonton, north London, on 31 August.
But moments later he was stabbed. He died the next day.
Perhaps it is time for people to start wearing swords again in UK for protection, like they did in Roman times
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