The defendant should lawyer up and tell his family to STFU.
The operator of the drone hovered too low in my opinion in the defendants yard. Depending on range, shotgun choke and load. I can't see a drone getting knocked out at 200 feet.
This drone is very light and pretty fragile. The propellers are made out of thin plastic that is very easy to break and breaking or severly damaging one propeller will disable the drone.
The maximum allowable altitude for drones, unless otherwise authorized by the FAA, is 400 AGL. How high a drone has to be flown above private property has not been settled by the courts. There is an old case where the military had to pay compensation to a homeowner for low level flights (83 feet) above his property but a strict limit hasn't been established by the FAA other than anything above 500 AGL is navigable airspace. There is a regulation that you cannot fly over any part of a person without a special exemption.
Unless this individual can demonstrate that the drone posed an immediate threat of death or serious injury I think he is up the creek on whatever charges there are for illegally discharging a firearm.