I forget my Chamber of Secrets exactly, but wasn't Hagrid made the scapegoat for a fatal 'accident' and that was how Myrtle's death was explained away publicly?
In canon, Hagrid had brought the giant-spider Aragog at around the same time -- and it was thought to have accidentally escaped his watch and murdered Myrtle. (so it was accident/criminal negligence on the part of Hagrid, murder on the part of Aragog)
We don't know the exact details in the HPMOR-verse, ofcourse.
(The HPMOR discussion thread after this one is here.)
The previous thread is over the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it. The latest chapter as of 09/09/2011 is Ch. 77.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: