At their nearest point the aircraft (Shady09) was around 2.2 miles away from the crash site. Also just found this article explaining that the MC-12 Liberty has been used in the past primarily by the United States Army Special Operations to identify HVT's in Afghanistan and Iraq. The MC-12 is also a crucial component of the Joint Task Force ODIN, which combines UAVs and manned surveillance aircraft to better identify and track high value targets. In particular, senior ISIS militants in Iraq.
Article:
https://militarymachine.com/mc-12w-liberty/