I’m not sure what the forensic value of ADS-B data and/or FlightAware but now that we are all broadcasting where we are and what we are doing - allegedly with WAAS accuracy, I suppose it’s going to be put to the test.
on the other hand, I suppose you could go to the FAA N-number database, look up the aircraft ownership, and send them an anonymous letter referencing the FlightAware data for the flight and asking them WTF they thought they were doing. It might prevent a repetition - maybe.