Was Snape's betrayal set up from Bk4?

[carodave92]

No: HPFGUIDX 133006

Lisa:

<snip> 
> Does he mean Snape is and *always was* his most faithful servant???
> Before HBP I thought Snape was the "one who left forever" and
> Karkaroff was the "one too cowardly to return." I still wasnt sure
> about his "most faithful servant", but now it seems that was Snape.
> Maybe I'm missing somehing completely obvious, But now it seems:
> 
> too cowardly to return- Karkaroff?
> gone forever- ????
> most faithful servant- Snape?



Carodave:

One, too cowardly to return - Karkaroff
One, who I believe has left me forever - Snape
One, who remains my most faithful servant - Barty Crouch JR, 
disguised as Professor Moody (polyjuice potion) and in place at 
Hogwarts

That was my take on it anyway.

Carodave, who is still reeling from Snape's betrayal of DD