**Spoilers, obviously**
After completing the Sarif plant and talking with Mr. Sarif, you will be asked to go to the morgue at the police station. In the lobby you can talk to Wayne Haas, who you must convince to let you into the station.
There are multiple approaches to this situation. If you have no upgrades invested in social augmentations, this is still possible going with absolving/pleading speech options.
Make a save just before talking to Haas so that in the event you screw up, you can start over from the beginning. There are different reports as to just how he will react to your speech, with some speculation as to this whole scenario having semi-random outcomes. But sticking with the absolve options I was able to get this my first try.
Below is a Youtube of the actual scene to give you an idea of what to expect. Obviously, spoilers if you have yet to reach this part of the game.