In January, officers confiscated up to eight cell phones belonging to high school students that had videos on them made by a male student who has since been expelled.
In a second investigation, an official estimated that "hundreds" of Madeira students and possibly others outside the school had received or circulated pictures of naked female students.
In the January case, the student has been charged with a felony count of disseminating sexually explicit material to minors. His attorney says he's not guilty.
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