Was he harassed?
Sounds like the sheriff simply investigated, as they do with many car drivers. Check the license, registration, etc.
Usually, it's Obama's sons who call such routine investigations "harassment."
Usually, it’s bootlickers who have no problems with being harassed for no legitimate reason.
Two can play that game.
No ones property or life were threatened in any way by this guy doing something completely legal... so where was the “terry stop” trigger for them talking with the pilot?
How would a deputy check the license of the pilot and registration of the helicopter?
An airman certificate is a life-time issuance and there is no paper registration for the aircraft as there is no yearly renewal requirements.