Effect of Bullets Type and Trajectories on the Angle Measurement Process Using the Lead-in Method for Bullet Marks on Metal Plate Car’s Body from Pistol

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Thitichaya Lueangphairod
Narong Kulnides


This research purposes the influences of bullets type and shooting trajectory, accuracy, precision, and tolerance on the angle measurement process using the Lead-in method for bullet marks on metal plate car’s body. The bullet trajectory reconstruction of the purposes is an experimental research that includes 100 simples of metal plate car’s body, 2 types of 9mm LUGER automatic ammunition, and 5 shooting horizontal angle (90, 75, 60, 45, and 30 degrees). The results of the research reveal that different types of bullets affect to the shooting angle measurements at 60-degree shooting angle with statistical significance at the level of 0.05, but the other shooting angles, the different types of bullets do not affect. to the shooting angle measurements. In addition, the best performance (accuracy and precision) of the angle measurement is at 90 degree shooting angle. On the other hand, the performance of angle measurement is decreasing when shooting angle is decreased. These results could be applied as a guideline for the verification and analysis of the angle measurement deviation to simulate the possible direction and position of the bullet trajectories that shoot to the evidence.


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How to Cite
Lueangphairod, T., & Kulnides, N. (2020). Effect of Bullets Type and Trajectories on the Angle Measurement Process Using the Lead-in Method for Bullet Marks on Metal Plate Car’s Body from Pistol. Journal of Criminology and Forensic Science, 6(2), 45-57. Retrieved from https://so02.tci-thaijo.org/index.php/forensic/article/view/223796
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