Casey Konstantin Serin (born September 10, 1982 in Tashkent, Uzbekistan) is a former real estate speculator and blogger. In a newspaper article, USA Today called him the "poster child for everything that went wrong in the real estate boom". Serin immigrated to America in 1994. In his early twenties, Serin worked as a web developer, but then decided to quit this job to pursue his dream of becoming financially independent through real estate investments. Beginning in October 2005 and continuing through the following year, Serin purchased eight houses in four southwest U.S. states, and then began blogging about the foreclosure process on the properties he was unable to resell. In time, six of the eight properties foreclosed.
He flew to Australia in June of 2007 for several weeks, leaving his wife with little or no financial supportAs for his real estate investments, Serin acknowledged to the Sydney Morning Herald that "the stuff I did is technically mortgage fraud, but it's not officially called that until someone prosecutes me and proves that that is indeed mortgage fraud,"  asserting a presumption of innocence. On the Jon Ronson show, Serin confirmed his use of so-called "liar loans".