How does detect evil work on an an NPC, say an Neutral Evil Wizard?
I am working on an idea that involves the PC's encountering a person who extends an offer to join his "group", he tells them they can meet him and his "group" at this house. Once in the PC's become trapped and see 6 shadowy figures (not sure how to describe them, sorta translucent people) who tell them to sit and let them relive their lives in what they tell them. Sitting with the figures causes the PC listening to it to see the figure's memories, including their own encounter with the person who convinced the PC's to come to the house.
Ok all of that is simple enough. It just struck me that one of the shadows is a Paladin, and the person is a Neutral Evil Wizard, so if the paladin were to use detect evil on him would she detect anything? and if so is there anyway to shield from its effects or give a false reading?
Heck would it make sense for the paladin to not detect evil on this random person who is trying to get her to go to this random place (he wouldn't use the same approach as he used on the PCs)