NEW YORK — The recent mass shooting at Covenant School in Nashville, Tennessee, that left six people dead -- including three children -- was carried out, at least in part, with semi-automatic rifles.
According to Nashville police, the shooter walked into the private Christian elementary school Monday armed with a handgun, but also an AR-15-style rifle and a semi-automatic pistol-caliber carbine.
"A conventional handgun will typically create a relatively small, round wound that sort of conforms to the size of the bullet," Dr. Michael Shapiro, chief of trauma and critical care surgery at Northwestern Medicine in Illinois, told ABC News."If it passes through the patient, the exit wound is typically a little bit larger with the skin edges everted a little bit."
Sometimes bullets from AR-15s and AR-15-style weapons can yaw, or tumble, before they hit a person, meaning there is not a linear path through the body. For example, a 9-millimeter handgun -- which the shooter carried into the school -- has a muzzle energy of between 300 and 400 foot-pounds of force. Because bullets from these weapons are traveling at a high velocity, they can destroy a significant portion of tissue and are more likely to hit major organs.
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