Just reading through this thread and I feel the need to point out something that many people don't know--many suicides, especially in the young and substance-impaired, are the result of sudden impulses. That doesn't mean there wasn't a tendency toward it already, as shown by her comments and the deleted note, but based on the evidence this particular event wasn't planned. Her decision-making skills would have been significantly affected by intoxication, and by all accounts she was upset, and that's all you need for a sudden fatal decision.