Like a good student, the unnamed teen went ahead and did the assignment without pausing to question the logic, value, or sanity of it. Suggested methods for starting summer vacation early included poison and "a mouse," though it's unclear if it was a computer mouse being wielded as a makeshift flail and/or garrote or an actual flesh-hungry rodent. The student had the self-exonerating wherewithal to include the qualifying phrase "When I do this (if I do) ...," so the school should probably run a plagiarism check to make sure the whole thing wasn't cribbed from O.J. Simpson's book.
The Juice didn't think to blame a mouse.
No specific teachers were threatened, which scaled the issue back from "Call the police immediately" to a mere "What in the name of Teaching Mrs. Tingle were you thinking?" The tutor was of course fired, presumably in a creative essay called "How to Terminate an Incompetent Nimrod." The student was "completely cleared of any wrongdoing," although they presumably received zero credit for the essay.