White Scorpion was part of a Red Section squad sent to Peru in Syphon Filter: Dark Mirror.
Syphon Filter Dark Mirror
A hulking figure in the Red Section ranks, White Scorpion was part of the unit sent to Peru which seemed to base its codenames on color and animal designations, as evidenced by his associate Black Viper. This is also in line with the Black King and Red Jack units that operated in Alaska. White Scorpion's people engaged KemSynth security employees at a harvesting plant in Iquitos, and he utilized a high-powered machine gun to shoot at Gabe Logan and Addison Hargrove from an upper building. Logan retaliated and killed him, but the remaining unit continued to attack after his death.
White Scorpion operates a turret with infinite munitions so you should snipe him from a distance. The MB-150's explosive darts will quickly waste him, but if you have a high powered pistol like the Desert models, they will also work. Alternatively, use the SMAW or MGL to knock him away before you climb up and melee him.