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

[wrexx1]

No: HPFGUIDX 138680

lebeto:
>     And for the final point, I'm not sure but does it say anywhere
> that one needs to be alive for their spell to work.  I thought it was
> a time based thing.  For instance, in the first book when Hermione
> hits Neville with the Petrificus Totalus I believe it runs off after a
> certain amount of time otherwise she needs to keep concentrating on
> having Neville frozen long enough for them to get to Fluffy's room.


Wrexx:
Agreed, Lebeto; the books abound with spells that were left behind by
dead folks. Look at Sirius' house for example; it took a major house
cleaning to remove spells cast by people who were long dead.

Wrexx