We had a small civilian jet crash near here last week. All 4 onboard killed. If you watch the flight track. The pilot never seemed to have complete control of the aircraft? Speed, course, etc...all over the place. Especially for a jet. His last radio transmission was about a device that feeds the instruments data being non-functional and he was disconnecting auto pilot. We were also experiencing a rare snow storm for our area at the same place/time he turned it off. The area was so remote they had to use ATV to access it and find it. NTSB contacted local 911 after it disappeared from radar. Local residents actually found it based on a loud 'boom' they had heard when it hit.
https://flightaware.com/live/flight/...40ZZ/KFFC/KJWN
http://www.kathrynsreport.com/2020/0...4vTscvV0c8df8M