It says type UC-35.
If that's right, it's def not a drone.
Although the callsign could be sequentially assigned to different aircraft.
Tail numbers "stick" to the aircraft for life, until it's sold anyway. Callsigns are assigned per flight.
UC-35A - Military Aircraft
UC-35A The UC-35A is a medium range executive and priority cago jet aircraft that is the materiel solution for the C-XX (MR) requirement. It is a commercial Off-the-shelf (COTS) Cessna Citation 560 Ultra V twin engined aircraft.