What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot did a visual check of the area and selected a launch/landing site away from parked vehicles and entrance T0 building. The area was not well lit. Pilot was standing approximately ten (10') feet from the launch site. There was no vo present, as all other available deputies were engaged in the service call. Upon launching the UAS, pilot attempted to climb the UAS to a height of approximately 20' AGL to conduct test of the flight controls. While doing so, the pilot heard the sound of the UAS striking an unknown object. The UAS then decended and struck the pilot. The UAS was later determined to have struck branch ends of a birch tree, and resulted in damage to one or more of the propeller blades of the UAS.
As the FAA filed it
PILOT DID A VISUAL CHECK OF THE AREA AND SELECTED A LAUNCH/LANDING SITE AWAY FROM PARKED VEHICLES AND ENTRANCE T0 BUILDING. THE AREA WAS NOT WELL LIT. PILOT WAS STANDING APPROXIMATELY TEN (10') FEET FROM THE LAUNCH SITE. THERE WAS NO VO PRESENT, AS ALL OTHER AVAILABLE DEPUTIES WERE ENGAGED IN THE SERVICE CALL. UPON LAUNCHING THE UAS, PILOT ATTEMPTED TO CLIMB THE UAS TO A HEIGHT OF APPROXIMATELY 20' AGL TO CONDUCT TEST OF THE FLIGHT CONTROLS. WHILE DOING SO, THE PILOT HEARD THE SOUND OF THE UAS STRIKING AN UNKNOWN OBJECT. THE UAS THEN DECENDED AND STRUCK THE PILOT. THE UAS WAS LATER DETERMINED TO HAVE STRUCK BRANCH ENDS OF A BIRCH TREE, AND RESULTED IN DAMAGE TO ONE OR MORE OF THE PROPELLER BLADES OF THE UAS.