LV & HP in GH

[revealme4u]

No: HPFGUIDX 113676

vivek wrote:

Hi,
I am a new member and haven't been able to go over all the archives,
but I will like to know how does DD and rest of the WW know about the 
downfall of LV in the first case,as there were no witnesses to the 
event except HP,who was just a baby. The scene must have been of 2 
dead bodies,a destroyed house and a baby with a scar,how does the WW 
realise that this means the *end* of LV.?
And how does DD realise that LV hasn't died,and will return,because 
there is no coment about HP killing the 'resurrected' LV,in the 
prophecy. 

Your thoughts please.