This is part of the main campaign and is unmissable.
There is nothing special you have to do for this achievement. If you get stuck at any point, please refer to the video below.
*** Spoiler - click to reveal *** The mission starts as soon as you meet Lucious in the Wayne Tower. From there on, just follow the mission markers and you will finally end up chasing a car. Take it down and interrogate the driver. The achievement unlocks after you have finished your interrogation.
(video credit: Gento)
Hope this helps you guys!
Any improvement? Let me know in the comments below!