She probably did fall accidentally.
Any way this cuts, I see it as a tragic waste of human life. And of her life. Whatever she was like, and whatever the circumstances, to end life, at age 18, in this manner and with all this publicity, is a waste of what God has given us as a beautiful gift - the gift of life. I find it beyond sad.
Someone wisely asked why she would go over a balcony that was fairly high, it seems, without her clothes on. Suggesting that it took some doing to get over the balcony in order for the 9-story fall to occur. That is a good question, no matter whether or not she was undressed. But I, too, wonder - if she were searching for a bathroom or for a door leading back to her room, why not have presence of mind as well to put on a stitch of clothing? Either she got hold of some very wild stuff that would induce her to force the balcony issue and plunge to her death, or there is something else here...something we are missing.
. Is it possible she was taking prescription medicine for depression or an even worse mental condition, and that it is one of those possibly implicated in suicide? Or, could she have been seriously depressed, bipolar or whatever(medicated or not), and when she came to herself, was disgusted by her own behavior. She sees two males there whom she had just met, maybe doesn't even realize exactly who they are in her confused state, realizes that she is nude and something went down there, but possibly she cannot even remember what went on. Not only that, but the two males are asleep and completely oblivious to her. She gets extremely down on herself for acting this way, and maybe she had acted like it before with similar depressing results, so in a fit of remorse and despair she throws herself off the balcony.
I don't assume everything was lighthearted and carefree with this girl. That can be faked, when deep inside, people are calling out for help.
Even supposing she had been drinking or was drunk, I don't assume that is the total answer to a life wasted and ended this way.