Ladj Ly on shocking President Macron with his Paris riot film: 'How could he not know?'

The director of "the new La Haine" talks about the country's angry underclass. Emmanuel Macron, France's President, was so appalled by Ladj Ly's Les Misérables, a film about a riot in a tough banlieue, that he launched an investigation. Stuart Jeffries interviews the director in the Guardian and finds out more about the motivation behind the Cannes Jury Prize-winner film.