Who was responsible for Sirius' death? ...

[Dana]

No: HPFGUIDX 167647

zgirnius:
> Actually, her target of choice was Dumbledore and not Harry, as 
> shown by the example you mention. She had Harry dead to rights for 
> the illegal DA, but when she saw in it a way to get Dumbledore, 
> she forgot all about Harry. It was also her interest in feeding 
> him Veritaserum in her office, the second time because she wanted 
> to know who Harry had been talking with.

Dana:
Her target choices where both Harry and Dumbledore but in this case 
it was Dumbledore not Umbridge that shifted the focus. She never 
forgets what she came for and why she kept trying to get the girl to 
talk. 

zgirnius:
> He would be sending and receiving a message using a secret means 
> of communication invented by Dumbledore and known to Order members 
> alone. It seems to me this might be something one might wish to do 
> privately, rather than in the hallway next to a room that contains 
> the sons of three Death Eaters. Especially if one is a spy who has 
> failed to describe this means of communication to the Dark Lord.

Dana:

Snape has no problem taking Tonks patronus, not even meant for him, 
just a year later. The DE kids wouldn't have know what it meant and 
who it would be from. 
They only had seen Harry use it against Dementors (Harry thought 
Malfoy and his friends were Dementors too as was their intention), 
they don't know it can be used as means of communication. Besides 
they were a little busy to notice what was going on in the corridors 
so it would not have been any real risk. 

I find it interesting that Snape's need for keeping his cover is 
always used as excuse for his inactions but at the same time him 
being a spy is at great personal risk. How much risk is it if 
someone never actually does anything because he needs to keep his 
cover?   

Dana