First of all, I want to present you the BRI for “Brigade de Recherche et d’Intervention” (old-nammed anti-gang); this is a french police service, based in Paris.
Here is the sniper team, with a spotter and a snipper called “Tireur Haute Précision”
The original picture come from this website.
Learn further informations about the BRI on the Préfecture de police website.