Does anyone have a theory about Peeves?

[revanto]

No: HPFGUIDX 46221

I remember in the first book that the ghosts all had a meeting about 
Peeves and they mentioned that he wasn't really a ghost. I also heard 
that Cedric was coming back to book five but as an essence or 
something (more tangible than a ghost?). I'm guessing that's what 
Peeves is too. I think that Peeves was was killed in such a way that 
he somehow went mad before he died EG he could have been tortured and 
the pain was too much before he died. That could explain his 
craziness and childish behaviour.

Any thoughts on this?

Cheers
Revanto
- "Never use your wand as a toothpick. Trust me on this one" -