Case ReportsMisleading Entry Wounds From Atypical Bullet BehaviorHaag, Lucien C. BS∗; Jason, Alexander BA, CSCSA† Author Information From the ∗Forensic Science Services, Inc, Carefree, AZ †Anite Group, Pinole, CA. Manuscript received July 12, 2021; accepted September 4, 2021. The authors report no conflict of interest. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal’s Web site (www.amjforensicmedicine.com). Reprints: Alexander Jason, BA, CSCSA, Anite Group, PO Box 375, Pinole, CA 94564/510 724 1003. E-mail: [email protected]. The American Journal of Forensic Medicine and Pathology: June 2022 - Volume 43 - Issue 2 - p 174-182 doi: 10.1097/PAF.0000000000000727 Buy SDC Metrics Abstract Some pistol bullets exhibit atypical wound ballistic behavior that can result in misleading and misinterpreted entry gunshot wounds. We demonstrate the atypical performance and behavior of these bullets using (1) high-speed videography of projectiles penetrating, perforating, and exiting soft tissue simulants; (2) Doppler radar tracking throughout simulated wound production; (3) downrange witness panels to record postperforation bullet orientation during a secondary impact; (4) laser tracking to assess and compare postperforation bullet deflection; (5) evaluation of “bullet wipe” around entry bullet holes in a victim's clothing; and (6) projectile penetration depth for differentiating primary from secondary gunshot wounds. Truncated cone and certain flat-point full-metal-jacketed pistol bullets in the 3 most common calibers of 9 mm, .40 caliber, and .45 caliber typically perforate the victim with little or no yawing, producing straight wound tracks and continuing to travel nose forward upon exiting. Any secondary gunshot victim downrange sustains a normal-appearing entry wound. Common pistol bullets exiting gunshot victims are typically destabilized and enter a yawing or tumbling flight, resulting in entry wounds that appear as typical, first strike entry wounds when in fact, they are secondary gunshot wounds. However, some bullets retain their nose-forward flight after emerging from a gunshot victim. These secondary but normal-appearing, round-shaped entry wounds may be erroneously identified as direct, primary strikes. Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.