No charges will be filed in Wednesday's accidental shooting at the Carter Lake police department. Thursday afternoon Pottawattamie County Attorney, Matt Wilber said the investigation showed nothing criminal, just a mistake.

Police Chief Shawn Kannedy accidentally hit Sergeant Dan Driver in the torso while conducting a firearms demonstration. He says Chief Kannedy was showing a couple of officers that a magazine from a full-sized gun would also work in their sub-compact service weapons.

He went to load the magazine into a 40-caliber service weapon without realizing it was already loaded, and the gun went off.

It's the kind of accident law enforcement officers train to prevent. The Omaha police department allowed Channel 6 into their Irvington training facility, to show how their officers learn to handle firearms.

Inside the shooting range, Lieutenant Scott Gray says, "They're required to wear a bullet resistant vest, eye protection and ear protection."

Carter Lake officers were wearing vests when looking at firearms with Chief Kannedy. Still, sergeant Dan Driver took an accidental hit just below the vest. The shot missed vital organs and the officer is expected to make a full recovery.

While policies may vary by department or state, basic gun safety principals are universal. "You don't point your weapon at anything you don't intend to shoot," says Lt. Gray.

He says Omaha’s officers in training aren't allowed to load or unload weapons unless they're on the range, facing downrange. They can use also ballistic clearing barrels for unloading.

Lt. Gray showed how the process works, with the gun pointed downward into a hole. "They're going to remove their magazine, place it in this tray, so there's still a live round in the barrel. So then, they're going to eject that live round-"

That live round, according to investigators' reports, was not ejected from Chief Kannedy's gun, and the weapon fired.

Back at Omaha's training facility, instructors have officers double-check, locking their weapon in an open position. "So they can see through the barrel, there's no magazine, there's no more ammunition and they can also see and inspect the barrel and make sure there's no live ammunition," Lt. Gray says.

He adds, the gun has to be inspected by at least two people, just to be sure it's unloaded and that any shots fired are deliberate.

As far as any criminal investigation on the Carter Lake shooting, Wilber says the case is closed. But he says that doesn't mean there won't be a civil case.

Wilber says it could mean policy changes within the Carter Lake police department; however, that would be up to the city. The city offered no comment Thursday.