There are several different types of physical evidence. Which type of physical evidence do you find to be the most interesting? why? you are permitted to discuss bloodstain interpretation or ballistics in this question.

Question is a 200 word minimum response, must be cited and referenced/non-plagiarized assignment please. Textbook perferred and that is in use: Criminal Investigations (11th ed.). Swanson, Chamelin, Territo, & Taylor (2012). New York, NY: McGraw-Hill.