CALABASAS ( —  A student’s  social media post  — including pictures of the Colombine massacre killers  — sent shockwaves through the campus of Calabasas High this evening.

CBS’s Tom Wait Wait people are feeling uneasy after receiving a robocall warning them that a post on social media was taken seriously enough by police to be investigated.

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“A CHS student posted inappropriate pictures and statements on social media. Other CHS students brought the information to administration, which we greatly appreciate,” said the robocall.

Wait did not see  the post, but the school’s superintendent says the student in question posted images on Instagram of the Columbine High School gunmen. Other students saw the photos and reported them.

“This is not okay,  And it’s frightening,” said mom Lesley Marvin.

She has two students  at Calabasas High.

“It really worries me – I’m hoping that you know we’ve discovered all we’re going to discover about this person,” said Marvin.

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The superintendent told Wait the unidentified student who posted the images is a junior and is new to the district. The pictures were posted in August but they weren’t noticed until a few days ago. Police were called, the student and his parents were interviewed and cleared.

The student was not suspended or expelled.

The fact he was apologetic kept him from being suspended, Wait reported.

“The student was very upset  once he had a sense of how serious this was he was crying in the principal’s office,” said Superintendent Dan Stepenosky.

The superintendent says parents should not be worried – the student is not a threat. The school, he said, did an exhaustive investigation.

Wait asked the superintendent, “For parents who say, some students are suspended or expelled for much lesser offenses, what would you say to those parents?”

He replied, “We look at everything on an individual basis and take it very seriously.”

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Students get social media training at Calabasas High School. The superintendent wants to show students how to behave – to avoid serious situations like this one in the future.