 Miguel Hidalgo y Costilla, Ignacio Allende, José Mariano Jiménez and Juan Aldama were tried for treason, executed by firing squad and beheaded during the Mexican independence in 1811.Their heads were on display on the four corners of the Alhóndiga de Granaditas, in Guanajuato.During the Mexican Drug War, some Mexican drug cartels turned to decapitation and beheading of rival cartel members as a method of intimidation.