Originally Posted by Mrs. Weasley:
I believe it is Sirius using his brother's initials. He could have been in contact with Dumbledore and be helping him find the horcruxes. Remember what Dumbledore told Draco on the astronomy tower. There are ways to make it look like a wizard has died. It makes sense to me to fake Sirius's death. No one goes looking for a dead man....


I agree with this...
.. Noone does go looking for a dead man, because if they are dead, then you won't find them walking around, spying, or recruting others to The Order Of The Pheonix....
My opinion is that Sirius isn't dead.. I have a theory about it, and if you'd like to hear it, just p.m. me..
Hmmmm....Interesting.. All of it...