I created this lesson for a Psychology 101 class when I realized that a room full of Criminal Justice majors was apparently incapable of interest in Pavlov, Skinner or Piaget unless the dog got shot, the rat was attacked or the child became a serial killer. HOWEVER, this is a great lesson/unit across multiple disciplines and, if I do say so myself, perfect for the end of the year. (Especially for seniors!)
This "lesson/unit" can last one or two class periods, or you can draw it out over a couple of weeks. In essence, the lesson involves staged crime scene photos and a list of statistics relative to the victim and those closest to her - who are all, of course, "persons of interest" in this crime. Multiple website resources are provided to assist (even non-criminal justice) students with advice and "clues."
The "KEY" is unique in that students may get the killer right but do not evidence the same clues relative to the original design. In this sense, teachers would do well to be prepared to assess the logic and critical thinking involved in the students' cognitive process - if there is an assessment involved....
UPDATE 2014: It was brought to my attention that some of the webpage links included with this product no longer work. I was able to find replacement links by Googling the title of the document; however, if you don't wish to do this, you can email me at email@example.com and I will send you copies of all the original documents I used for this lesson.