The New Orleans PD ballistics unit is about to win a big award for clearing a huge backlog.

It may have also played a major role helping solve a Lakefront-area murder where a victim's son was arrested.

"Once we fire the weapon, the water will stop the projectile to help us recover pristine projectiles," said officer and Crime Lab examiner Sean McElrath as he fires bullets from a .45-caliber handgun into a specially designed water tank.

That firing helps determine if a particular gun can be linked to or eliminated from consideration in crime.

"Obviously you want to look at a perfect reference bullet, as opposed to one that's been through a wall, or human body," McElrath said.

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Source: Fox 8