El Halconazo

The Corpus Christi Massacre or El Halconazo ( was a massacre of student protestors during the Mexican Dirty War in Mexico City on 10 June 1971. It happened the day of the Corpus Christi festival. Nearly 120 protesters were killed.
On 29 November 2006, former President Luis Echeverría Álvarez pleaded guilty and was put on house arrest. In 2009, charges were dropped because of lack of evidence.