You had me going there, festuco, but there is this little problem...

[tinglinger]

No: HPFGUIDX 129715

tinglinger
============
Dumbledore and the Order could have figured out what happened
but, unless there was a pensieve recording Lily's words when
she made her sacrifice, how do we know what she did or
whether Voldemort indeed said "You don't have to die!"
I assume that CSI examines "physical" evidence that is
uncovered at the scene.

festuco
======================
Because we get it from Harry's memories when he is confronted
by the dementor boggart (p. 177 PoA Bloomsbury harcover).
Harry was there, witnessed it, but was just too young to
remember consciously.
Apparently JKR uses the theory that everything we went through
is somewhere in our brains and can be accessed at the right
circumstances. It is also Harry's problem when practicing
the Patronus charm. On the one hand he wants to defeat the
Dementor/Boggart, on the other hand, he does hear his parents
voices which, though it is still awful to hear them dying,
is also very precious to him.

tinglinger
==============
Wow..... at first I thought to myself (revealed herein for the 
first time lest you argue that I know not what I thought...lol)
how could I have been so lame? Clearly Harry recalled the
events of Godric's Hollow when they were dredged up in the
course of the dementors at the Quidditch game with Hufflepuff 
(POA-Ch 9-Grim Defeat) and also when working on the Patronus
charm with Lupin (POA- Ch 12-The Patronus).

But something still bothered me...... 

And then it clicked .....

Dumbledore had Hagrid deliver baby Harry to the Dursleys
at Privet Drive the very next day 
SPECIFICALLY TO GIVE HARRY THE PROTECTION MADE POSSIBLE BY
LILY'S SACRIFICE (OOP-CH 37-THE LOST PROPHECY).

So.... unless Harry told the whole story to Hagrid before
falling asleep over Bristol, how did Dumbledore know that
Lily had sacrificed her life to save Harry without someone
else being there to tell him that a sacrifice indeed
happened? Somehow I don't think that Dumbledore would have
left him with the Dursleys without benefit of the protection 
(Hell, he wouldn't have lasted five MINUTES with those muggles 
without it ...........)

tinglinger
who was nearly Gilderoyed by my own riddle -
so many theories so little time till HBP
is released to check them out at 
http://groups.yahoo.com/group/potterplots