You can get both 'Damage Control' and 'One With the Shadows' in the same level, popping right after one another.
During the second mission (Chinatown Square - eliminate the king to Chinatown), disguise yourself in the dealers outfit after following him down a set of stairs. Make your way up a different set of stairs and into a room with a Sniper Rifle on the desk.
Go to the window and wait to be seen, then shoot and kill 'The King'. Once done, hide anywhere in the room and wait for things to cool down. Peek before you exit, checking to see how many (if any) officers are in the room. Walk up to the officer and kill him.
This is how I just got mine.