Lesser Evils

Lesser Evil is an optional side quest in Deus Ex: Human Revolution. It is given to the player by Tim Carella.

Introduction
After returning to Sarif Industries from the plant mission, Adam Jensen receives a page to return to his office. There he finds Tim Carella, who is in a desperate situation and needs Jensen's help.

Overview
It turns out Carella is the mystery Neuropozyne thief. As he explains it, he agreed to aid a Bobby Tindall in stealing Neuropozyne from Sarif Industries. Now Carella wants out, but Tindall has security footage of Carella committing the thefts, and is blackmailing Carella. Carella needs Jensen's help to deal with this or he will almost definitely lose his job and face criminal charges.

Walkthrough
First Jensen needs to meet with this mystery Tindall to ascertain the situation. Tindall lives in the westmost apartment complex of Detroit, which is behind a closed gate. There are three ways to get in there: Once inside the complex, Jensen can hack any computer and check the emails to get the gate code.
 * 1) Hack the gate. It has a level 2 terminal.
 * 2) Jump onto the rooftop from an adjacent fire escape. The cybernetic legs prosthesis upgrade is helpful here, but not required.
 * 3) Stack barrels or crates to jump onto the fire escape of the building. The most straightforward way to do this is to simply stack a crate on the dumpster, and then jump up.

Next Jensen will find that Tindall's apartment is empty. Upon reading his emails, an armed junkie will arrive. Jensen needs to take care of him and meet Tindall near the gas station.

Tindall explains that while it is true he and Carella conspired to steal Neuropozyne, it was for a good cause: Neuropozyne addiction is a common and almost guaranteed side effect of augmentation, and many poor people in Detroit simply cannot afford constant supplies of the expensive drug. Tindall explains he was giving away the Neuropozyne, not selling it on the side.

Unfortunately, his philanthropy has made him dangerous enemies. Rival drug dealers upset with the competition have a problem with him, and of course Tindall now has to face armed junkies looking for their fix. Tindall asks for Jensen's help, and the player can accept in which case he is tasked with eliminating two dealers in a nearby basketball court, or refuse and intimidate Tindall for the security footage.

Alternate option: Stun, knockout or kill Tindall and loot the security footage.

Alternate option: If you have the social augment, you can use phermones to convince Tindall to resolve the drug dealer problem himself.

Once Jensen acquires the security tape, he can simply meet up with Carella near the subway station to complete this quest for a weapon mod reward.

Video Guide
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