How did WW learn LV evaporated?

[pippin_999]

No: HPFGUIDX 166378


> Kvapost wrote:
> > 
> > >> My question is - how did the WW find out about LV's evaporation?
> I didn't think there were witnesses willing to share this with the
> Daily Prophet? Or were they?

Pippin:
According to McGonagall, nobody knew exactly what had happened,
just that You Know Who had disappeared, and people were saying
that Harry Potter had stopped him. The rumors could have started
with Death Eaters themselves trying to get information.

According to Sirius, there were DE's who knew that Voldemort had 
gone to GH on Wormtail's information, so there must have been
some Death Eaters who knew in advance of the attack.
Wherever the rumors began, they would begin to spread
quickly as soon as the Ministry responded with  "we can neither
confirm nor deny" instead of "we cannot confirm".

Pippin