Complex sentence: Benoit's sister had stated that she may have left home because she was not happy with her living conditions and in 2005 her case has been reclassified from a runaway to endangered missing persons case.
Split into simpler sentences: Benoit's sister had stated that she may have left home because she was not happy with her living conditions. In 2005 her case was reclassified from a runaway to an endangered missing persons case.