The only way the player may figure out certain important things is by letting the mission fail time and time again, while paying attention to details the world over to figure out what he should anticipate next time. It turns out that the proper way to solve this is to run to the roof, take the sniper gun out, shoot at the little guy in the black kimono and then run back to the car, avoiding the helicopter that had waited for the assassination to take place so that it would appear on your neck the very second. Dear mother of tedious design bottlenecks! I climbed to one roof, took out my sniper rifle, and while I was observing the movements of guards bellow (thinking all the while how I would like to first kill one guard, take his uniform and then after I assassinate my primary target leisurely walk to my getaway car), some scripted things took place and,, the game told me the mission had failed.