Where were Barty jr.'s marbles?

[Mindy, a.k.a. CLH]

No: HPFGUIDX 23916

I don't get it -- Moody just unveiled himself to be a DE (OK we didnt yet
know he was Barty jr. but he told Harry he was a DE) and then he wants to
kill Harry. Then -- what? He is still at Hogwarts, which is Dumbledore
domain. Voldie is somewhere in a muggle cemetery. In 5 minutes the door
will burst open and in will come all of Harry's mentors and find him
murdered by Mad Eye Moody. What will his explanation be? Or, let's say he
doesnt' manage to kill Harry. He just told Harry he's a DE. Harry jumps
up and tells them. What does he do now? Barty is in enemy territory. How
silly of him to reveal himself and tell it all to Harry -- what was he
thinking? Was he intending next to disapparate and return to Voldie,
leaving real mad-eye in the big trunk? Hmmm?