Here is my guess: It may be no coincidence that this happened just after the mother died. Perhaps the son is the guilty party, and the parents knew. The mother was adamant that they all keep quiet about this, possibly even sending the son 'away' so he could stay out of trouble. Now that Patsy is gone, the father is free to come forward. Just a hunch, I could be way off base, but with the few facts we have does anyone else have a possible theory?
My first thought too. But I'm usually wrong about these things.
Thailand?