EWL,
Buster and Uncommon have made some very valid points. Like me they are concerned how you are handling this.
Running companies has taught me the hard lesson to worry over things you can change not things now beyond your control.
We all fail to do this time and again, I would point out to you that you are now makng that mistake and inturn will adversely effect yourself and those around you.
Talk to the airlines and Feds take advise, then pass it on to the daughter she has legal standing in this matter, you have none. You are not in a position to take any action. Then start concentrating as best you can on helping those you can effectively help.
All the best mate