But what about the e-mail she sent to her parents 5/1/01 around 10:30 a.m. (I think it was.)
The parents have never questioned that it might not have been from her.
If she had a "Sent" folder that kept copies of all her emails, it would not be difficult to 'forge' an email to her parents. Most people have a certain style they use in email and it can be different styles to different people.
However, if her computer didn't have copies of emails previously sent, it would not be so easy.