After spotting the local kingpin, go left from where you first entered this main area. There you will find a car and a guard taking a smoke. Stay hidden and wait for him to finish his cigarette.
After he walks away from your view, follow him up the stairs and subdue him. Then drag his body down the stairs and hide him in a dumpster. Be sure to check your radar to make sure no one is facing your direction.
Activate the car alarm, which will draw in the kingpin. Stay hidden as he approaches. When he’s at his car, eliminate him and hide his body in the dumpster. Then head for the mission exit, being mindful of guards and others on the radar that might be suspicious of you.
Good news! You’ve just gotten your first Silent Assassin rank. Bad news! It gets harder from here on out.
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