Did he escape? Tracks were found leading to the horse corral.
Read more here: http://losangeles.cbslocal.com/2013/02/12/authorities-responding-to-big-bear-home-on-report-of-hostage-situation-unknown-if-connected-to-dorner/
Update: AP is reporting that Dorner did not leave the building, and that one shot was heard as the building began burning.
Update 2: ABC News is reporting that a body was removed from the smoldering remains of the cabin where Dorner was holed up.