Gavoury started his police career at Hazebrouck in 1936, occupying a variety of posts.
Gavoury was assigned to Algiers beginning in 1960, retaining responsibilities in Morocco.
[1] Gavoury was assassinated by two members of the OAS, Claude Piegts and Albert Dovecar, at the direction of Roger Degueldre.
Gavoury was stabbed to death, aged 50, in his studio on the Rue du Docteur Trolard in Algiers on 31 May 1961, eight days after beginning an investigation into the OAS.
[2] Piegts and Dovecar were condemned to death on 30 March 1962 by a military tribunal in Paris, and executed by firing squad on 7 June 1962.