The day after her death, authorities said Monday an autopsy will be needed to evaluate what led to the death of Bobbi Kristina Brown, daughter of singer Whitney Houston. In a statement, the Fulton County Medical Examiner’s Office says the time that elapsed from when she was found unresponsive in January until her death Sunday will “complicate” its effort to reconstruct events. “Interpretation of autopsy findings and other information will also be challenging,”