Ultimately that is sad as your past is who you are. You might want to forget parts of it, but to totally cut it off would be very hard to do and so the suicide isn't exactly surprising in this case. Could be she had something to hide or run from, or she just got caught up going down the rabbit hole and got lost in it.
I would be surprised if they couldn't find out who she was originally as pasts are shared and so there are folks who can fill in the pieces.
it's no use going back to yesterday, because I was a different person then.
¯ Lewis Carroll, Alice in Wonderland
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