Scrimgeour/WerewolfBites/Legilimency/DDsecrecy/DarkMagic/Umbridge/Prefect/etc

[Pippin]

No: HPFGUIDX 179762

lizzyben: 
I think that's as close to a confession as we'll ever get from 
Dumbledore for anything.

Pippin Fowler:

Dumbledore actually confesses to a death that could have been avoided, 
though one can easily disagree with AlD that he was responsible for it.

"It is *my* fault that Sirius died," said Dumbledore clearly. "Or I 
should say almost entirely my fault--I will not be so arrogant as to 
claim responsibility for the whole....If I had ben open with you, 
Harry, as I should have been, you would have known a long time ago that 
Voldemort might try to lure you to the Department of Mysteries, and you 
would never have been tricked intog there tonight. And Sirius would not 
have had to come after you. That blame lies with me, and with me alone."

(OotP Chapter 37)

If Harry had practiced Occlumency, Voldemort would not have been able 
to lure Harry to the Ministry, and Sirius would not have followed.

If Kreacher had not lied, Harry would have known that Sirius was safe 
at Grimmauld Place. (Incidentally, Kreacher did not die when 
AlD "persuaded him" using Legilimency to reveal what Kreacher knew 
about Harry going to the Ministry. AlD did not kill anyone to get a 
memory, according to the evidence in canon.)

If Sirius had remained at Grimmauld Place, at Snape's request, to tell 
AlD what had happened to lure Harry to the Ministry, then Sirius would 
have been entering the Ministry with AlD, instead of already engaged in 
the fight with Bellatrix.

If Voldemort had died when his AK bounced off baby Harry, then none of 
this...

One can go on and on, casting blame.

"I cared about you too much," said Dumbledore simply. "I cared more for 
your happiness than your knowing the truth, more for your peace of mind 
than my plan, more for r life than the lives that might be lost if the 
plan failed....What did I care if numbers of nameless and faceless 
people and creatures were slaughtered in the vague future, if in the 
here and now you were alive, and well, and happy?...My only defense is 
this: I have watched you struggling under more burdens than any student 
who has ever passed through this school, and I could not bring myself 
to add another--the greatest one of all."

(OotP Chapter 37)

I don't believe AlD has directly killed anyone, but I think both he and 
Harry feel responsible for some deaths that occurred while they were 
figuring out how to terminate Voldemort. And that may be partly what 
AlD and Harry are referring to in Harry's vision in DH Chapter 35. 
Additionally, I read Harry's reply as "You never killed if you could 
avoid it--unlike Voldemort, who killed many times when he could have 
avoided it."

Your interpretation may vary.

Pippin Fowler