Friend of mine is working on the flightline in Tucson. 2 Iraqi F-16s departed that evening along with 2 US ones, 3 one-seaters, and one 2-seater. Only one didn't came back. My friend saw D-model with dorsal spine while taxi towards EOR Apron and he told me it was #1601. He's not personally assigned to the plane which was lost but info spreads fast arround the personnel.
I think MD point was maybe the ADS-B transponder that could (should..?) be turned on as long as the jet is in Civilian Controlled Airspace thus it got to act like civilian plane.. (e.g.) - speed limit is stricted for 350kt (250? can't recall) below 10K ft. And flightradar24.com is for example showing such data like speed, alt, hdg, rate of climb/descent online in real time.