DENVER -- We've shown you the districts and the schools with the most dangerous weapons reports. Now, we turn our focus to the schools that had no dangerous weapons reports for the most recent school year.

Our question -- are those reports fact or fiction?

7NEWS Investigator Tony Kovaleski continued his investigation into dangerous weapons, holding schools accountable.

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Dangerous Weapons In Schools View Complete Statistics

The list includes guns, knives, brass knuckles, needles, wrist rockets and tear gas -- all dangerous weapons, all taken from students in Denver-area schools.

We analyzed reports from the Denver area's ten largest school districts. We found 654 reported dangerous weapons incidents last year.

Denver Public Schools had more than any other district -- 283 cases of dangerous weapons on DPS campuses.

Tony Kovaleski/7NEWS: "Is that a failure?"

Ed Ray/DPS security director: "No, I don't think so."

The director of security for Denver's public schools says the nearly 300 dangerous weapons found in his district are not a problem. Instead, he claims that it's evidence of a security staff doing its job.

Ed Ray/DPS security director: "I think we have a higher level of no tolerance of weapons therefore they are found more often."

Tony Kovaleski/7NEWS: "So are you saying the other districts aren't doing their jobs?"

Ed Ray/DPS security director: "I'd never say that."

But our analysis of school weapons reporting certainly raises that question.

We found 66 percent of the schools in Denver's ten largest school districts did not report a single dangerous weapon for the entire school year.

Tony Kovaleski/7NEWS: "Sixty-six percent of the schools said, 'We did not have a single dangerous weapon,'"

Randy Brown/school safety critic: "That's not true. They are not reporting it then."

Brown's children attended Columbine High School. In recent years, he's challenged school administrators to tell the truth about crimes on campus.

"Those principals are not doing their job. If those principals are not finding weapons in some cases in every school, they are not doing their job," Brown said.

According to school district records, Columbine High School and 24 other Denver-area high schools went the entire year without reporting a single dangerous weapon on campus.

That means 25 high schools, more than 23,000 students, more than 170 days of school -- and no dangerous weapons.

Tony Kovaleski/7NEWS: "Are you questioning the accuracy of those numbers?"

Randy Brown/school safety critic: "Oh absolutely."

While Brown questions, one police officer confirmed that in some cases, school administrators look the other way.

Tony Kovaleski/7NEWS: "Are all weapons on campuses being reported?"

David Larkin/school resource officer: "I would say a majority of them are, but there are occasions when they are not."

Larkin, an Aurora police officer, patrols the halls in the Cherry Creek School District.

"Sometimes maybe a football player, basketball player gets caught with a knife like this and the dean's under some type of dilemma. 'What should I do, because if I turn the kid into the police or make some type of documentation of it, maybe he's not going to play football Friday night?'" Larkin said.

Our analysis of Cherry Creek's dangerous weapons shows 30 incidents reported, including a Colt 45 and a magazine of bullets with an Overland High School student, a switch blade at Thunder Ridge Middle School and a 45 mm gun with two magazines of bullets at Prarie Middle School.

But that's not the total picture, because according to Larkin, some administrators in the district decided not to report a dangerous weapon.

David Larkin/school resource officer: "I think they take it personal. Sometimes a student will come on campus with a weapon and they are reluctant to report that to the police."

Tony Kovaleski/7NEWS: "You've seen it happen?"

David Larken/school resource officer: "Yes I have."

Tony Kovaleski/7NEWS: "He says administrators are not always reporting dangerous weapons?"

Monte Moses/Cherry Creek superintendent: "It certainly troubles me to hear that claim."

Monte Moses/Cherry Creek superintendent: "I would certainly want him to let me know about it."

Tony Kovaleski/7NEWS: "If an administrator looked the other way, what would happen?"

Monte Moses/Cherry Creek superintendent: "That would be cause for very clear and severe disciplinary (action) for that administrator."

Tony Kovaleski/7NEWS: "Would you fire them?"

Monte Moses/Cherry Creek superintendent: "It could happen."

Cherry Creek has asked to speak to the officer.

The question our investigation raises -- are all schools really embracing the policy of zero tolerance?

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7NEWS Investigates: Weapons In School -- District Analysis

7NEWS Investigates: Weapons In School -- School Analysis