Notch's REAL name is Markus Persson, not Steve. Notch doesn't have a brother, and almost certainly wont. Notch also posted a twitter feed stating "Herobrine is NOT a part of Minecraft, but he might be soon." Making that statement true, he implemented a Herobrine and zombie Herobrine skin into the the X360 edition. That was probably the Herobrine the dude posted a comment about, saying Herobrine killed him on Xbox. I hope I've cleared things up for people, and in advance, you're all welcome. Herobrine very well may have been in the early editions of Minecraft as a coding bug or glitch as one of the patches stated that Herobrine was removed, but other than that, there is no hard proof that Herobrine has, or will exist in Minecraft, other than through mods on the PC. Sincerely, a person who is right.