I'm very interested to hear what possible law the helicopter could have broke
Well let’s start with the FAAs favorite
91.13 Careless or reckless operation.
(a)Aircraft operations for the purpose of air navigation. No person may operate an aircraft in a careless or reckless manner so as to endanger the life or property of another.
In an attempt to take the drone out the helo was low over the jet skis operators and maneuvering erratically in its efforts.
§91.111 Operating near other aircraft.
(a) No person may operate an aircraft so close to another aircraft as to create a collision hazard.
(b) No person may operate an aircraft in formation flight except by arrangement with the pilot in command of each aircraft in the formation.
The FAA has left ZERO question as to whether or not drones are aircraft.
And while on that subject:18 U.S. Code § 32 - Destruction of aircraft or aircraft facilities and §91.113 Right-of-way rules.
No matter how you feel about the drones right to be there (and that is still in question) it was not the helo pilots job to take it out. In fact it goes completely against the prevalent perception that drones are “extremely dangerous” in close proximity to manned aircraft.
Edit: Now, whether or not the FAA takes this seriously, is anyone's guess. I am aware that it has been sent all the way to the top. That said I've had conversations with seasoned helo pilots with thousands of flight hours tell me that this is complete BS and could be a game changer in the FAAs approach to these incidents. We'll see.
I also realize many here will take the helo pilots right to take him out but, bottom line is: If the FAA wants UAS pilots to take them seriously, they need to take UAS and their increasing role in the NAS seriously. They can't just have it one way.