Yeah, there's a lot of possibilities of why it happened. If it's natural causes, that is frankly just so tragic (as is every other possibility).
I only really heard that the general thinking was it was natural causes... What other possibilities have been doing the rounds?
I read somewhere that she was taking just medications to ease the severe pain in her head, maybe (according to the read) she assumed a lot of these medications, but no one of the journalist (i read mainly italian articles over the web) seems openly supposing something other than the fatality. Sincerly, i belive that she was a very strong women, and a person committed to helping young people educating them on safety, who wrote a book called "Life is a gift"... can only be gone for tragic fatality. And at the end, this is what i need to belive.
If I`m honest, her taking her own life did cross my mind but only because I didn`t really know that much about her tbh. From what I`ve heard and read about her life and untimely death, I think this has just been down to natural causes brought on by something caused in her accident. Terribly sad whatever...