Her myspace page says she's 16, which conflicts with the reporting that she was 13 when this happened (Oct. 2006).
In addition, someone is still logging into her account as the account was last accessed today (Nov. 18, 2007).
Honestly, that’s likely a fake page, someone else’s page with the same name, or else it was hacked somehow (between phishing and other hacks, anyone who doesn’t keep a very close eye on their profile at some point will probably learn that some bot has been posting spam through it). Also, if a 13-year-old wants a profile, they’ll have to put a fake age in that’s above myspace’s age limit, so you’ll never find a profile with the official age listed as 13.
As far as her parents go, they were mostly really good about keeping tabs on what she was doing online, who she was communicating with, and not letting a girl her age have unlimited/unsupervised internet access. They went way above and beyond what the average parents of kids that age would do to keep them safe on the internet. The number of children today who use social-networking sites either are doing it behind their parents’ back, or their parents don’t care or are naive enough to think that their kid ‘knows better’ than to talk to a stranger online.