In the Commercial Appeal (Memphis, TN newspaper) there was a picture of another Caravan crash in TX. The plane ran into a house and was upside down. The pilot broke his leg but was released from the hospital. I couldn't find anything on the internet about it. The paper reported that it was engine failure.

The caravan flies very poorly in icing conditions (it has wing boots but there's still a lot of non-anti-ice surface). Single engine IFR, single-pilot, and a tired pilot make for a great flying combination.