What ever they went to Butte for probably had nothing to do with the accident. Potty stop or someone feeling ill. Even if it was airplane related I always was hesitant to bring attention to the FAA meeting me if they couldn't help. Some guy said it was icing like Buffalo but that is far fetched even if the NTSB got it in the news today. Sounds like they were high on approach and he tried to maneuver to get it down, stalled and crashed.