Original ArticlesTwo Cases of Tandem Bullets—One Homicide and One SuicideKhau, Allyson∗; Melinek, Judy MD∗,†,‡Author Information From the ∗University of California Davis †PathologyExpert Inc ‡Alameda County Sheriff-Coroner. Manuscript received March 9, 2019; accepted April 30, 2019. Reprints: Judy Melinek, MD, PathologyExpert Inc, 3739 Balboa St, No 102, San Francisco, CA 94121. E-mail: [email protected]. The authors report no conflict of interest. The American Journal of Forensic Medicine and Pathology: September 2019 - Volume 40 - Issue 3 - p 262-265 doi: 10.1097/PAF.0000000000000497 Buy Metrics Abstract We report 2 unusual cases of tandem bullets. Case 1 is a homicide involving a piggyback screw. Case 2 is a suicide involving multiple tandem bullets as a result of improper ammunition size. Tandem bullet injuries can have a wide variety of presentations. Therefore, it is essential that forensic pathologists understand the mechanisms of tandem bullet wounds and familiarize themselves with the autopsy and radiological findings seen in tandem bullet injuries. This report supports that use of incorrect caliber ammunition and the lodgment of foreign objects in the barrel of a gun are possible causes of tandem bullet injuries. Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.