How do I find out who owns a foreclosed property?

[Lindsay West]

There's a house around the corner from my parents' house that's been abandoned for several years. I'm interested in buying it, so I looked up the tax assessor's records to see who owns it. The record shows the owner as the woman who bought it in 2005, but I'm pretty sure the house has been foreclosed on. The neighbors on both sides told me it's foreclosed and there are papers posted in the windows stating the property is abandoned. Minor repairs have also been made to the property over the last six months(according to the neighbors). That being said, the property has not been put up for sale. So, if it is owned by a bank, how do I contact those who could sell me the property?