Cause of death: execution by firearm
Guy Prosper Eustache Môquet (French pronunciation: [ɡi pʁɔspɛʁ østaʃ mokɛ], 26 April 1924 – 22 October 1941) was a young French Communist militant. During the German occupation of France in World War II, he was taken hostage by the Nazis and executed by firing squad in Châteaubriant in retaliation for attacks on Germans by the French Resistance; Môquet went down in history as one of its symbols. The farewell letter he wrote to his family at age 17 is now a mandatory reading in all French high schools.
Source : Wikipedia