This case, based on an actual case of product tampering that occurred in Seattle in 1986, was designed for use in an introductory course in forensic science for non-science majors. By working through the case, students gain an understanding of the variety of strands of evidence that have to be woven together in order to develop a case against someone who has committed a crime, specifically a murder. It also touches on the importance of communication between different law enforcement agencies in solving crimes. In addition, students consider how probability can play a role in crime investigations and learn what latent fingerprints are and how an investigator collects them and uses them in an investigation.