Published: Dec 19, 2012 6:21 PM EST
Updated: Dec 19, 2012 6:42 PM EST

LEE COUNTY, Fla.- A police tactics expert, who worked during the Columbine Massacre, is offering his take about safety techniques on school campuses.

School shootings, like the one in Connecticut, will be embedded in the minds of people around the world, for a long time.

It's raising questions of whether or not staff members should be armed.

"I think that it's not inappropriate for qualified, certified, concealed carry individuals, whether they be teachers, or whether they be school administrators, to be allowed to carry while they are at work or school," says David Grossi.

Grossi, who works with the Lee County Sheriff's Office says, he does not believe schools should be gun-free zones.

"Who follows laws? Law abiding people! Criminals don't pay attention to the fact that this is a gun-free zone. Criminals by nature break laws," says Grossi.

Which is why Grossi says schools need that extra layer of protection.

"I'm talking about off-duty sheriffs deputies or police officers under contract by the school district to simply be security for the schools," Grossi said.

Grossi has dug deep to find out why things happen during school shootings.
In fact, he was called to give his analysis on why there was such a delay in the swat teams response during the Columbine Massacre.