You should probably hire a PI............................................................................

You can't. You have to finish high school, attend four years of college, three years of law school, and then pass the bar exam.

I am not sure who told you this, but it is false. You have to follow the court order or have it amended.

Depending on how much you loaned him, you will need to sue him small claims court, and provide proof that it was a loan and not a gift.

You have no cognizable damages to sue for. And the airport authority is immune from any such lawsuits.

Of course they can. I am unclear as to why you would even think otherwise..............................

No, just as she couldn't sue you if you called her names. Free speech.......................................

You can hire a PI...............................................................................................................

You are asking the legal equivalent of how to perform surgery on yourself or someone else. We can't teach you to practice law.

Assuming she was not injured by this, there really is nothing to sue for. Consult a local malpractice lawyer to confirm.