How to Destroy a Gun Barrel to Prevent Ballistics Identification

When faced with the challenge of avoiding detection through ballistic analysis, some may consider ways to destroy or modify the barrel of a firearm. This article explores the methods that can be used to render a firearm's barrel untraceable, thereby preventing an accurate match with a recovered bullet at a crime scene.

Introduction

The process of matching a bullet to a firearm typically involves visual examination by experts. However, with enough rounds fired through the barrel, the rifling can be altered, making it difficult for experts to confidently establish a match between the test bullet and the evidence obtained from a crime scene.

Case Study: The Colombo TV Series Episode

In the hit TV series Colombo, the assassin utilized a clever method to avoid detection. By inserting an adapter into the barrel of a pistol, he could fire 38-caliber bullets with a 45-caliber gun. After the crime, he removed the adapter and showed his weapon to the police, which appeared to be nothing more than a typical handgun. Later, when tested, it revealed that the weapon was not the one used in the murder.

Manipulation of Rifling with a Reamer

A dedicated individual might argue that using a reamer on a handgun's barrel could remove a small amount of material (0.025 inches or 0.635 millimeters) and obscure traces of the bullet's passage. However, this method is highly controversial and, according to forensic experts like Patricia Cornwell, might render the firearm unsafe and unpredictable. One valid concern is that altering the barrel can cause it to spring apart or even explode, posing a significant risk to the user.

Theoretical vs. Practical Considerations

Theoretically, if you were to remove a small amount of material from the rifling of a handgun's barrel, you might believe it would erase the evidence of the bullet's passage. However, in practice, such alterations can be devastating to the firearm. Even if it appears to be successful, there's a strong likelihood that the barrel could become unstable or dangerous.

Cases of Criminal Intent

A real-world example is a hunting incident where a hunter fired over a sunken path. The bullet was deflected by an overhanging branch and struck a passerby. To avoid any potential blame, the hunter attempted to tamper with the barrel. This act of destroying evidence was deemed criminal intent and led to further investigation.

Conclusion

While it is possible to alter a gun barrel to prevent accurate ballistics identification, the risks and liabilities associated with such actions are substantial. Modifying a firearm can lead to unpredictable results and poses a significant safety hazard. Law enforcement relies on these forensic techniques to solve crimes and bring individuals to justice. Efforts to tamper with evidence can be—and often are—met with severe consequences.