DoubleAgent!Lupin was

[pippin_999]

No: HPFGUIDX 137278

> > > Pippin
> > > >>The smoking wand is the disappearance of Fenrir. Last we
> > > saw, he was stupefied. 
> 
> Miz Storge:
> 
> Pippin, I just reread that part last night. Four Death Eaters
stormed  up the stairs: the brother and sister, Fenrir and "the 
Death Eather with the brutal face".  She clearly says the Death 
Eather that was  Petrified was "the brutal faced one". But I haven't 
found exactly what happened to Fenrir, either. Must keep re-reading, 
but I THOUGHT he ran  past Harry in the chase.

Pippin:
::slams fingers in the oven door:: Sorry, Fenrir was placed in the
full body bind, and so, come to think of it, was the fellow  on top
of the tower. It's Scrimgeour who says the DE on top of the tower  
was stupefied. 

Shows he's a busy man, I guess. Or it makes us think, like Jo's
perpetual carelessness about how many students there are, that maybe 
she just forgot to tell us about Fenrir. But I'll bet she didn't.

It's difficult to tell how many DE's there were. After Fenrir is
PT'd, and Amycus is hit with impedimenta, Harry sees McGonagall, 
Ron and Lupin each fighting a separate Death Eater, and Tonks
fighting the big blond one beyond them. The one McGonagall is 
fighting is identified as Alecto, so there are at least two more, 
besides Fenrir unaccounted for, since Harry only sees Snape, 
Draco, Amycus, Alecto and the big blond one running for the gates.

Pippin