Architecture student Steven Grisales, 21, from Argentina, was stabbed to the chest as he made his way towards Silver Street station in Edmonton on August 31.
A 15-year-old boy has been charged with the murder of a man who police say was stabbed to death after remonstrating with youths for throwing conkers at him.
Enfield resident Mr Grisales (Pictured above) had only recently returned to London from Argentina.
A 15-year-old boy has been charged with murder and remanded by Enfield magistrates to appear at the Old Bailey on Thursday.
A 16-year-old girl and a 19-year-old man have been released on bail.