Cyberhacker ...
I imagine the FBI would be involved due to US involvement in aircraft (engine?) manufacture ...?
Also there were 3 US citizens aboard.
Finally, - (and no I'm NOT one of the tinfoil hat brigade) I think one could possibly be a person of extra interest for the US - Yvonne Selke - as she apparently worked for Pentagon contractors Booz Allen Hamilton doing work for the National Geospatial Intelligence Agency.
Yvonne Selke and Emily Selke, Nokesville Mom, Daughter, Presumed Dead in French Plane Crash | NBC4 Washington