What we know is from media reports, in my neck of the woods. Pilot texted wife. Wife did not respond to his text. Nobody has given out the whereabouts of the wife and children as being accurate. She and the children maybe are protective custody but that is speculation.
You can bet the NSA and their cell carrier know what the text was and which tower it pinged. Someone from the cell carrier should have spilled the beans by now if the price was right.