how can I track down a seller who disappeared

[Maiko Miyake]

Hi, I want to find a seller of a house who just got off the list. My offer was once rejected and I was waiting to make an offer again, before going foreclosure. I told my agent to keep an eye on it, but while I went out of town for two weeks, a last minute short sale was advertised, nobody bid, and not it gets taken off the market. and my agent did not catch that at all :pissed: The seller's agent claims she does not know anything, and is not giving out seller's number. I searched her through a few people search website but no luck. Any idea how I can find her?