In Book[[../../Books/Chamber_of_Secrets/Chapter_15|Harry 2Potter and the Chamber of Secrets]] we learn that VoldmortVoldemort, or as he was then known Tom Riddle, had framed Hagrid and Aragog for a murder they did not commit. In Book[[../../Books/Half-Blood_Prince/Chapter_22|Harry Potter and the Half-Blood 6Prince]], through Aragog's death and Hagrid's grief Harry obtained a piece of information that is vital for the fight against Voldemort. Another example of J.K. Rowling’s love of symmetry.
