Throughout the game you will be presented with choices during a cut-scene to do something with evil Karma or good Karma. This is the forth choice you will have to make. Choose the
Evil Karma (red) option to get this trophy.
If you want to know what the choice is, hit the spoiler below:
*** Spoiler - click to reveal ***After running into Hank again, he will help you get to Augustine, but will actually betray you to her, causing your brother to die. Understandably when you catch up to where Hank is trying to escape the island, you are a bit pissed. After knocking him down, you will start to choke him. You will have the Karma options to Spare Hank, or Kill Hank. Choose Kill Hank and you will end up killing him. This will not let him ever get to his daughter (the reason for the betrayal), and you will have taken his life as revenge for him getting your brother killed (hence the eye for an eye). The trophy will pop after the cut-scene and the mission Smoke And Mirrors ends.