In a lot of movies, or TV shows, like In the Line of Fire or 24, if the criminal organization suspects their new member wannabe of perhaps being an undercover cop, they will test him by giving him an empty pistol, or bullet sometimes, and have him kill a helpless person. However, is that realistic? I mean if you are an undercover cop, and you are giving one bullet and are forced at gunpoint to kill someone, wouldn't you do it anyway? If you don't you will die, along with the other person anyway. So it's inevitable, and there is no way you wouldn't do it, even if you were a cop. So what does this situation logically prove really? I was thinking of using the same thing, in order for an undercover's loyalty to be tested, so they can gain trust, quicker for the story. But is that scenario as logical or realistic as the movies would have you think?