some missions i had trouble with this as well. soon as it starts rotate the camera with whatever control you use.along the edge of the screen there will be solid white arrows, 'hollow' white arrows, and of course the colors of each squad member. solid arrows are friendly civilians/in need of rescue hollow white arrows are for ENEMIES saved me a whole lot of time by simply left clicking on one of the solid white arrows.the camera will automatically move to the location of the npc. sometimes if said npc is on an adjacent level, either up or down, they may not be visible til you adjust the camera level.