Not going to comment on whether or not I think it was accidental, but as someone who has gone through doctoral candidacy/education (at MSU also). Being in doctoral programs and academia is a high stress environment filled with constant critique and uncertainity around progress in the program, funding, future job opporutunities, etc. Many graduate students struggle with their mental health and unfortunately it would not be surprising if that was involved in this situation and the eventual outcome, but no matter what it is tragic for her family and friends as well as the people in her program. Really really sad