The students will determine if a substance at the crime scene is blood. They will also learn the forensic techniques involved in evidence processing. This laboratory kit introduces students to presumptive blood tests and evidence processing. During the lab, students will analyze different items to find traces of blood. They will also process a piece of evidence just as it would be processed at the actual crime scene. Supplies are included for up to 30 students working in six groups. As in all Lyle and Louise modules, this kit is geared to high school and undergraduate courses and is matched to National Science Education Standards. Refill kit includes 6 bottles of hydrogen peroxide, 6 bottles of phenolphthalein solution, 6 sets of cotton swabs, 6 sets of positive controls and presumptive test cards. Also includes 6 carpet samples from the crime scene, fully illustrated teachers manual with technique background. It can be stored at room temperature.