Eliminate Carl Maddox | Act 2 - Ghost of Sarajevo Sniper: GW2 Guide

After a short cutscene you will be given your final objective - eliminating you former partner, Maddox. He will be found in a moving vehicle, so the shot will be rather difficult. The car will start moving at [780m] from your current position and will be closing in on you till [360m]. Try not to hesitate for too long, as eventually the car will disappear from your view and you will fail the mission.