15 March 1972,
His colleague Jon Ugutz Goikoetxea was killed in the area of Elizondo fleeing the Civil Guard. Three members of an ETA command are in Ziga with Civil Guard control and after a shooting they flee. The boin body was found in Azaldegi.
The family was denied information about the autopsy, but they knew the corpse was shot.
Source:
Josu Martínez, daughter of the Sea.