The blue Assasin on the right is now a corpse.
Corpses are dead bodies in all 3 games. They are created when someone in the game is killed by any sort of way. They offer very good protection from enemy attacks and can be shot and hit around the map. In maps like Hijack (and its "Dawn" variant) and Speeding Train, the corpses will fall off the solid ground and go off the screen as the planes or train are moving.