The term forensic science may evoke thoughts of blood-spatter analysis, DNA testing, and identifying molds, spores, and larvae. A growing part of this field, however, is that of digital forensics, involving techniques with clear connections to math and physics. This article describes a five-part project involving smartphones and the investigation of a hypothetical crime and subsequent mock trial. It was conducted in a forensic science course. Smartphones have become ubiquitous in high schools. For the lesson presented in this article, 31 of 32 students had access to their own smartphones, and, for any who did not, classroom tablet computers were made available to all. Smartphones can be powerful tools to engage students in a variety of scientific explorations.