I think that the other peoples also need to have an influence bar, although you don't have to be able to read it. I also think that there should be more difficulties, such as where the person who is it may consider doing actions to trick you.
In fact, a career mode would be sweet, with different amounts of people, some people more suspicious than others, story events happening in games, the ability to level up and get perks (like 3 more from calling innocent people),