5 doors in the Rich quarter that you need to knock, it's best that you talk with all the survivors before going for some extra loot.
1- By the side of the town hall, where you meet the Magistrate
2- House near the fountain square on the bottom left side corner of the map
3- House where the city guards are protecting in the central area of the map next to a house on fire (Easy to miss)
4- House on the top central corner of the map, near the bridge with a boat
5- Close to house number 4, a little to the south, where the beastmaster is patrolling
Credit to ALEC for their
guide.