Snape's Destiny/JKR quotes

[lifeavantgarde]

No: HPFGUIDX 105153

<snipped extraneous interview bit>
> > > SF: Right I shall bear that in mind. Worth watching Serverus 
Snape
> > > 
> > > JKR: He's worth keeping and eye on, definitely
>  
> Stefanie:
> 
> > She is yet again telling us to keep our eye on Snape. Very 
> > interesting...and we needn't think he's too nice? 
> 
> 
> Katie:
> 
> Hmmm... At this point, I don't think JKR would trick us about 
which 
> side Snape is on; I believe he's firmly on the side of the Order. 
So 
> I'd guess that it would be something in the past-- something we 
don't 
> know yet-- that she's hinting at. But what could be so terrible 
that 
> it would make her constantly temper her liking for Snape?
> 
> I'd guess he was indirectly responsible for or somehow complicit 
in 
> someone's death, back in his DE days. Maybe, just possibly... 
someone 
> like the Potters?
> 
> -Katie
>  who likes Snape, but knows that JKR isn't telling us something

Stefanie: 
I don't know...I wouldn't put it past JKR...

...Buuuut, you've hit on one of the theories I can't seem to unstick 
my mind from. I *do* believe that Snape knew that Peter was the spy 
(- His being a spy during the year the Peter was feeding information
-His Occlumens powers rending him trustworthy in LV's eyes [no 
reason to keep things from him]
-His decided lack of anything but personal remarks in the Shrieking 
Shack
-His determination to soul-rape Lupin and Snape before they met with 
anyone from the MoM
-His being friendly with Lucius Malfoy even though Malfoy is 
friendly with Karkaroff who knows from being at his trial that Snape 
was a spy for Dumbledore
...and more...I've had an essay on the back burner but I'm a 
procrastinator of the first order)

My main gripe is that we've not been given a precedence for Snape 
containing his vindictiveness. Could he be ambitious for his own 
preservation?