Michael,

Don't take this as legal advice and obviously you need a competent attorney. Of course the operator is in big trouble. Whether or not you are guilty of anything, you unfortunately have a part in this by the simple fact that you were present. You might have been an unwitting and unknowing participant. However if you do not proceed properly you could easily find yourself in even bigger trouble than the operator, especially if attempting to cover for them. The troubles relating directly to the aircraft might end up being the least of your concerns. You might want to familiarize yourself with terms/subjects such as; Impeding an investigation, Obstruction, Aiding and Abetting, Perjury, Deposition, Cross examination and of course the old standby, "What are they going to say at the hearing?"

Good luck...