This is an activity where students must find the killer of a student by reviewing derivatives. This is a review on finding derivatives implicitly, derivatives of inverse functions and trig inverses, as well as derivatives of logs and exponentials. The handout is specific to my school but is a Word document so you can edit with names of teachers from your building and places in your building. Students loved this activity because it add a little mystery to a worksheet. They also found it funny to think of what teacher finally snapped!