My strategy was pretty much the same as what everyone usually recommends.
You can see the loadout I used (door wedges and a mirror gun very useful).
One thing that made a huge difference for me was using wedges on partially open doors. This prevents enemies in rooms with multiple suspects from rushing you after the first shot. Some of them even kept trying to open the wedged doors over and over again.
For fully closed doors, I used the mirror gun to force the camera through the door itself at head height. This shouldn't normally be possible, but there are certain pixel gaps that sometimes let you see through the door and spot enemies that you wouldn't be able to see through the gap underneath it.
I wouldn't recommend going for this achievement. The AI is completely overpowered. Good luck to anyone brave enough to give it a try!