![The far-right fugitive José Ignacio Fernández Guaza, in his home in Ingeniero Maschwitz (Buenos Aires), in October 2023.](https://imagenes.elpais.com/resizer/v2/XEETXT4B4ZC5ZCM5JOJDCAMEUI.jpg?auth=aafb449536bcdda26d4dbfe4a5c777c94ec9bef6db23c53de3127e59a8301eee&width=414&height=233&smart=true)
The secret life of far-right gunman José Ignacio Fernández, killer of left-wing student Arturo Ruiz
EL PAÍS tracks down the perpetrator of a fatal attack during a demonstration for amnesty for political prisoners that marked the Spanish Transition in 1977