Here's another question that remains unanswered.
How did Maura get her hands on the credit card number she stole from the student at UMass, which she used to order food?
As you may recall, at the time of her disappearance, Maura Murray was in trouble with the local police and prosecutors of Hadley, Mass, for credit card fraud.
When the police confronted her during their pizza-delivery-sting at Kennedy Hall, Maura admitted to stealing another girl's credit card number. She said she got it off a receipt she found in the trash. But when police located the receipt, the number was not on it. They asked Maura to give them the paper she kept the number on, and when she handed it over to police, they noticed there were several other numbers on there as well.
It's important to note, here, too that for those in favor of the "Maura is still alive" theory, this incident shows she is comfortable with stealing someone else's identity.
So, in 2004, how would someone like Maura get that credit card number? The best I can think of is by going through someone's purse at a gym.
Any other thoughts?