Snape didn't kill DD with AK!! And here's the evidence

[eggplant107]

No: HPFGUIDX 138648

> Blasted into the air???  Fall slowly
> over the battlements?  What happens 
> to Dumbledore doesn't resemble the
> Avada Kedavra at all. 

Depending on circumstances we've seen Avada Kedavra leave a scar,
destroy a house and smash a very large statue into dust. In fact I
don't think we've seen that particular curse work exactly the same way
twice. This desperation to make Snape innocent or Dumbledore not dead
reminds me of the silly Serious is not really dead stuff when OOTP
first came out. It's time to get over denial, the characters may not
have developed in ways you like but it's JKR's book. 

Eggplant