It is clear he doesn't have much sympathy for the boy whose brush with death prompted the unprecedented charge.
It lies off Stamford New Road, close by a shopping mall in the prosperous Manchester suburb of Altrincham, where random stabbings simply don't occur.
And as far as the police could see, it hadn't occurred, at least not the way the older boy had said.
As for himself, John was a virtual Scheherazade, a gifted fabricator.
"Staggering," said the judge who would hear his case.
Despite his mother's pleas, the teenager was put on a waiting list. When pressed by police, the boy would finally concede, reluctantly and only after changing his story several times, that it was his best friend, Mark, who had stabbed him, though John said he had no idea why.