International Freedom of Expression Exchange ( IFEX ) , a global network of civil society organizations that defend and promote the right to freedom of expression , declared 23 November as the International Day to End Impunity in 2011 . The anniversary was chosen to mark the 2009 Ampatuan massacre ( also known as the Maguindanao massacre ) , the single deadliest attack against journalists in recent history , in which 57 individuals were murdered , including 32 journalists and media workers
Maguindanao massacre
Maguindanao massacre
International Day to End Impunity for Crimes Against Journalists