Gringotts Break-in: An inside job?! A defector?!

[kidzero7 at hotmail.com]

No: HPFGUIDX 27304

This post was inspired by the post about a Weasly possibly defecting. 
I think there is a chance it has already happened...

Not sure if this is unanswered in the Harry Potter series:

Did Professor Quirrell admit to breaking into Gringotts to steal the 
Stone? Or did everyone assume it was him? (though I do remember him 
being in Diagon Alley, near Gringotts. So who knows... He could have 
been waiting for the delivery of the stone...)

The one thing that struck me was this:
- Gringotts is maze-like to begin with. So even if you knew what 
chamber was holding the stone, it would be very difficult to navigate 
it's mazes and find it still.

- Gringotts is very well protected by charms and creatures that even 
the very best wizard would have a difficult time handling. (Thus the 
papers reported a very powerful Dark Wizard must have been 
responsible)


So what I propose is:
What if the "cool" Bill Weasley is responsible for the would-be theft?
- He works for Gringotts
- He would be aware where the Stone was being stored
- He would have an easier time navigating the tunnels
- He would not be suspected because he works for them
- He is a charm breaker capable of getting past Gringotts' traps 
(especially if he sets them up also)

I don't have the books with me right now, but...
- Where was Bill at the time of the break-in?
- Can we totally back up his innocence?
- Has he given us any reason to suspect him of defecting?

Just some thoughts...