Dead. On the other hand, that would explain quite a bit. The power of the time travel spell, for one thing. The surprise of all the other students upon seeing him. Their suspicions that he might be a Death Eater in disguise. Now it all made sense. Surprisingly, Albus was not as devastated by the news of his death as he probably ought to have been.
"No, you have not gone crazy," he said quietly, his lips twitching as he tried not to grin too obviously, "although you may think I have soon enough." Then again, the majority of the Wizarding World already thought him a bit mad. What was one more?
[OOC: Oops! I meant boy, not body. *blushes* But I'm sure you figured that out. ;-)]