South of the overpass on the east side of the Slums you hear human screaming (once you hear that there will be a teardrop marker placed on the map telling you to check it out). Head there and knock on the door to learn that a woman is having a baby and her husband needs alcohol.
Bring him some to meet the requirement three times and the quest is completed. Well you got them drunk anyway... I would totally understand if you know, you felt like they needed killing?