By the time that edition of The Daily Mirror hit the streets, Alphon was in police custody, as he had surrendered himself the previous night at 11.30pm at Cannon Row Police Station.
It looks as if the Daily Mirror article was being used as a means to flush Aphon out. The article portrays the Alphon parents as being distressed by their experience, presumably the better to prick the conscience of their son.
I am assuming Alphon's handing himself in before midnight is connected to the parents being dragged into the enquiry. He would have seen an evening newspaper carrying similar details on the 22nd? Or did someone alert him to the events?