Harry Potter Question Bout Mad Eye Moody?

Well Alastor Mad Eye Moody was himself when he called for the Ministry of Magic about his trashcan problem and ever since then, Barty Crouch Jr. was impersonating him. He kidnapped the original Moody at his own home. We see the real Moody again at the end of the film locked in his own magically engorged trunk. He confines all of this in the book when Dumbledore feeds him the truth potion.