This item is an experiential learning activity for beginning physics students relating to gun ballistics and projectile motion, easily adaptable to the high school classroom. This scenario involves the case of a young man slain in his own apartment with a handgun. True to the PBL method, students will sift through given information to separate useful from irrelevant data, then collaborate to apply physics in finding solutions. This resource includes a printable student manual. The Instructor's Guide requires a password, accessible free of cost to registered teacher-users. Also included are links to background information on the Problem-Based Learning (PBL) instructional method and links to additional PBL exercises by the same authors.