This is discussion archived from a time before the current discussion method was installed.
Working Title: To Know Him I Must Become Him: From YKTTW
This trope is kind of the point of Manhunter. The detective thinks like the serial killer to catch him. Apparently he used this technique to catch Hannibal Lecter and was very disturbed by the process. I don't remember this movie well enough to add it to the page and sound coherent.
