I see problems with the student, the judgement, and the school.
Bringing actions against a student for activity that took place away from school, not at a school function . . . black mark against the school.
False accusations of criminal activity may constitute libel, and subject the person who made them to lawsuits. Falsely asserting a school administrator is a pedophile - which could seriously impair that person's career - would seem to fit any reasonable definition of libel. Black mark against the student.
Judge Munley's citations of allegedly improper actions by other students at official school functions have no discernable relevance to actions that took place away from school, without the use of school resources. Black mark against the judge.
Bringing hardcopy of the offending material to school may be the lever needed to make the suspension stick. Black mark against the student.
The student allegedly lied to the principal when questioned . . . refusing to answer questions about non-school-related actions would have been wiser, and well within what a smart eighth grader ought to be able to accomplish. But unless there's evidence that teachers/administrators can be similarly punished for lying to students, I say black mark against the school.
Bottom line: I see NO good guys here.