Teaches students to utilize physical as well as chemical techniques to place a suspect at the scene of a crime, or to eliminate the probability of his being present during the time of a criminal act. Because mineralogy covers a wide range of materials and substances, a thorough investigator will remove all sorts of samples from the crime scene. Soil, glass, dust, and metal traces are just some types of materials which are analyzed in this kit to link a suspect to the general locality of the crime scene.