What did Brigham Young teach regarding Blood Atonement, and is that doctrine still held today in the LDS/Mormon Church? Brigham Young taught the doctrine of Blood Atonement that indicated the blood of Christ was insufficient to provide forgiveness for some sins.  What are the specifics regarding the doctrine of Blood Atonement that Brigham Young taught?  Where is this teaching found?  What sins could be atoned for by the cross of Christ and which could not?  

Is this doctrine still believed today?
I found this article at Desert News concerning the topic:


  The Church of Jesus Christ of Latter-day Saints released this
  statement Wednesday:
  
  In the mid-19th century, when rhetorical, emotional oratory was
  common, some church members and leaders used strong language that
  included notions of people making restitution for their sins by giving
  up their own lives.
  
  However, so-called "blood atonement," by which individuals would be
  required to shed their own blood to pay for their sins, is not a
  doctrine of The Church of Jesus Christ of Latter-day Saints. We
  believe in and teach the infinite and all-encompassing atonement of
  Jesus Christ, which makes forgiveness of sin and salvation possible
  for all people.


That same site states the date of this announcement as June 18, 2010.