Snape is still working for Dumbledore in book 6

[Tonks]

No: HPFGUIDX 159673

> montims:
> Ooh - I just flew off on a flight of fancy - if they HAD made the UV, 
who would have cast the spell?  So I thought of Aberforth, and I 
realised it could have been done after the prophecy eavesdropping 
incident - Aberforth held on to Snape, DD finished with Sybill, they 
all three sat down for a little chat, Snape convinced them of his good 
intentions, bada bing bada boom, the UV was cast and Snape was forever 
after DDM.

Tonks:
I like the idea. This would leave Aberforth able to tell Harry about 
Snapes loyalties. The only problem with this idea is that I don't think 
that Snape switched side until AFTER he gave the informantion to LV. So 
while this idea gives us someone to tell Harry the truthabout Snape, 
the time line is not quite right.

Tonks_op