I have a hard time swallowing the idea that the police would dismiss a string of messages detailing the methods and times of death for a string of 'accidents' or 'suicides' as pranks, particularly when many of the incidents have a full class of witnesses ready to swear that's exactly how or at least when the death happened.
And "I was in the class" has to to be bullshit. She touched everybody in the class roster, and still got punished? Play by your own fucking rules, Ousama. And no, being an incorporeal ghost or something is still cheating, since they wouldn't be in the class roster.
This is getting within inches of the "dropping it" line.