El Pais: Abdelbaki Es Satty, the imam from the small Catalan town of Ripoll who headed the jihadist cell behind the terrorist attacks in Barcelona and Cambrils in mid-August in which 16 people died, it has now emerged he was an informant for Spain’s National Intelligence Center (CNI) during his time in a Castellón prison where he served four years for drug trafficking –  a sentence that started in 2010.