Atlantic County prosecutors said the discovery spurred them to upgrade the charges filed against Edward Bonek.
The announcement came during Bonek's initial court appearance on Thursday, one day after a search warrant was executed at his Absecon home.
He didn't enter a plea and was represented by a public defender who declined comment.
Bonek had just completed his first full year as principal of Pleasantville High School after previously serving there as vice principal. School district officials have not discussed Bonek's employment status following his arrest.
Bonek is charged with multiple counts of possessing and distributing child porn, as well as official misconduct.
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